Document and Entity Information - shares	9 Months Ended
Document and Entity Information - shares	Sep. 30, 2017	Oct. 25, 2017
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2017
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	Q3
Trading Symbol	ACHC
Entity Registrant Name	Acadia Healthcare Company, Inc.
Entity Central Index Key	0001520697
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		87,853,599

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 75,661	$ 57,063
Accounts receivable, net of allowance for doubtful accounts of $41,786 and $38,916, respectively	295,756	263,327
Other current assets	92,407	107,537
Total current assets	463,824	427,927
Property and equipment, net	2,966,215	2,703,695
Goodwill	2,730,362	2,681,188
Intangible assets, net	86,951	83,310
Deferred tax assets - noncurrent	3,689	3,780
Derivative instruments	26,176	73,509
Other assets	65,369	51,317
Total assets	6,342,586	6,024,726
Current liabilities:
Current portion of long-term debt	34,805	34,805
Accounts payable	95,105	80,034
Accrued salaries and benefits	99,893	105,068
Other accrued liabilities	111,403	122,958
Total current liabilities	341,206	342,865
Long-term debt	3,234,146	3,253,004
Deferred tax liabilities - noncurrent	81,672	78,520
Other liabilities	179,329	164,859
Total liabilities	3,836,353	3,839,248
Redeemable noncontrolling interests	18,648	17,754
Equity:
Preferred stock, $0.01 par value; 10,000,000 shares authorized, no shares issued
Common stock, $0.01 par value; 180,000,000 shares authorized; 87,045,124 and 86,688,199 issued and outstanding as of September 30, 2017 and December 31, 2016, respectively	870	867
Additional paid-in capital	2,512,951	2,496,288
Accumulated other comprehensive loss	(385,180)	(549,570)
Retained earnings	358,944	220,139
Total equity	2,487,585	2,167,724
Total liabilities and equity	$ 6,342,586	$ 6,024,726

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Receivable, allowance for doubtful accounts	$ 41,786	$ 38,916
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, authorized	10,000,000	10,000,000
Preferred stock, issued	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	180,000,000	180,000,000
Common stock, shares issued	87,045,124	86,688,199
Common stock, shares outstanding	87,045,124	86,688,199

Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Statement [Abstract]
Revenue before provision for doubtful accounts	$ 728,712	$ 744,802	$ 2,143,696	$ 2,139,039
Provision for doubtful accounts	(11,998)	(10,137)	(31,892)	(31,013)
Revenue	716,714	734,665	2,111,804	2,108,026
Salaries, wages and benefits (including equity-based compensation expense of $4,175, $7,145, $19,007 and $20,989, respectively)	385,562	408,242	1,145,578	1,157,557
Professional fees	53,042	47,687	142,772	137,970
Supplies	28,652	30,555	85,000	88,449
Rents and leases	19,049	19,740	57,455	55,013
Other operating expenses	82,328	79,748	249,161	230,950
Depreciation and amortization	36,442	36,418	105,256	101,145
Interest expense, net	44,515	48,843	130,777	135,315
Debt extinguishment costs		3,411	810	3,411
Loss on divestiture		174,739		174,739
Gain on foreign currency derivatives		(15)		(523)
Transaction-related expenses	5,665	1,111	18,836	33,483
Total expenses	655,255	850,479	1,935,645	2,117,509
Income (loss) before income taxes	61,459	(115,814)	176,159	(9,483)
Provision for income taxes	15,970	2,396	46,259	27,767
Net income (loss)	45,489	(118,210)	129,900	(37,250)
Net loss attributable to noncontrolling interests	129	402	306	1,575
Net income (loss) attributable to Acadia Healthcare Company, Inc.	$ 45,618	$ (117,808)	$ 130,206	$ (35,675)
Earnings attributable to Acadia Healthcare Company, Inc. stockholders:
Basic	$ 0.52	$ (1.36)	$ 1.50	$ (0.42)
Diluted	$ 0.52	$ (1.36)	$ 1.50	$ (0.42)
Weighted-average shares outstanding:
Basic	87,017	86,618	86,912	85,376
Diluted	87,172	86,618	87,038	85,376

Condensed Consolidated Statements of Operations (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Statement [Abstract]
Equity-based compensation expense	$ 4,175	$ 7,145	$ 19,007	$ 20,989

Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 45,489	$ (118,210)	$ 129,900	$ (37,250)
Other comprehensive income (loss):
Foreign currency translation gain (loss)	69,622	(89,645)	188,744	(351,528)
(Loss) gain on derivative instruments, net of tax of $(6.7) million, $3.6 million, $(18.8) million and $20.2 million, respectively	(9,402)	6,387	(24,354)	30,306
Other comprehensive income (loss)	60,220	(83,258)	164,390	(321,222)
Comprehensive income (loss)	105,709	(201,468)	294,290	(358,472)
Comprehensive loss attributable to noncontrolling interests	129	402	306	1,575
Comprehensive income (loss) attributable to Acadia Healthcare Company, Inc.	$ 105,838	$ (201,066)	$ 294,596	$ (356,897)

Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) (Parenthetical) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement of Comprehensive Income [Abstract]
(Loss) gain on derivative instruments, tax	$ (6.7)	$ 3.6	$ (18.8)	$ 20.2

Condensed Consolidated Statement of Equity (Unaudited) - 9 months ended Sep. 30, 2017 - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Other Comprehensive Loss [Member]	Retained Earnings (Accumulated Deficit) [Member]
Balance at Dec. 31, 2016	$ 2,167,724	$ 867	$ 2,496,288	$ (549,570)	$ 220,139
Balance, shares at Dec. 31, 2016	86,688,199	86,688,199
Common stock issued under stock incentive plans	$ 2,057	$ 3	2,054
Common stock issued under stock incentive plans, shares	81,992	357,000
Common stock withheld for minimum statutory taxes	$ (5,335)		(5,335)
Equity-based compensation expense	19,007		19,007
Cumulative effect of change in accounting principle	8,599				8,599
Other comprehensive income	164,390			164,390
Other	937		937
Net income attributable to Acadia Healthcare Company, Inc.	130,206				130,206
Balance at Sep. 30, 2017	$ 2,487,585	$ 870	$ 2,512,951	$ (385,180)	$ 358,944
Balance, shares at Sep. 30, 2017	87,045,124	87,045,000

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Operating activities:
Net income (loss)	$ 129,900	$ (37,250)
Adjustments to reconcile net income (loss) to net cash provided by continuing operating activities:
Depreciation and amortization	105,256	101,145
Amortization of debt issuance costs	7,340	7,714
Equity-based compensation expense	19,007	20,989
Deferred income tax expense	29,416	25,857
Debt extinguishment costs	810	3,411
Loss on divestiture		174,739
Gain on foreign currency derivatives		(523)
Other	10,672	731
Change in operating assets and liabilities, net of effect of acquisitions:
Accounts receivable, net	(28,681)	(12,579)
Other current assets	26,099	(12,973)
Other assets	(566)	(1,134)
Accounts payable and other accrued liabilities	(26,381)	2,067
Accrued salaries and benefits	(7,937)	(10,759)
Other liabilities	7,677	3,746
Net cash provided by continuing operating activities	272,612	265,181
Net cash used in discontinued operating activities	(1,261)	(5,524)
Net cash provided by operating activities	271,351	259,657
Investing activities:
Cash paid for acquisitions, net of cash acquired	0	(683,285)
Cash paid for capital expenditures	(193,817)	(249,961)
Cash paid for real estate acquisitions	(33,297)	(37,947)
Settlement of foreign currency derivatives		523
Other	(6,062)	(1,135)
Net cash used in investing activities	(233,176)	(971,805)
Financing activities:
Borrowings on long-term debt		1,480,000
Borrowings on revolving credit facility		179,000
Principal payments on revolving credit facility		(166,000)
Principal payments on long-term debt	(25,913)	(46,069)
Repayment of assumed debt		(1,348,389)
Payment of debt issuance costs		(35,748)
Issuance of common stock, net		685,097
Common stock withheld for minimum statutory taxes, net	(3,278)	(7,917)
Other	1,649	(1,821)
Net cash (used in) provided by financing activities	(27,542)	738,153
Effect of exchange rate changes on cash	7,965	(9,469)
Net increase in cash and cash equivalents	18,598	16,536
Cash and cash equivalents at beginning of the period	57,063	11,215
Cash and cash equivalents at end of the period	75,661	27,751
Effect of acquisitions:
Assets acquired, excluding cash	0	2,505,407
Liabilities assumed	0	(1,605,240)
Issuance of common stock in connection with acquisition	0	(216,882)
Cash paid for acquisitions, net of cash acquired	$ 0	$ 683,285

Description of Business and Basis of Presentation	9 Months Ended
Description of Business and Basis of Presentation	Sep. 30, 2017
Accounting Policies [Abstract]
Description of Business and Basis of Presentation	1. Description of Business and Basis of Presentation *Description of Business* Acadia Healthcare Company, Inc. (the “Company”) develops and operates inpatient psychiatric facilities, residential treatment centers, group homes, substance abuse facilities and facilities providing outpatient behavioral healthcare services to serve the behavioral health and recovery needs of communities throughout the United States (“U.S.”), the United Kingdom (“U.K.”) and Puerto Rico. At September 30, 2017, the Company operated 579 behavioral healthcare facilities with approximately 17,400 beds in 39 states, the U.K. and Puerto Rico. *Basis of Presentation* The business of the Company is conducted through limited liability companies, partnerships and C-corporations. The Company’s consolidated financial statements include the accounts of the Company and all subsidiaries controlled by the Company through its’ direct or indirect ownership of majority interests and exclusive rights granted to the Company as the controlling member of an entity. All intercompany accounts and transactions have been eliminated in consolidation. The accompanying consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information. Accordingly, they do not include all of the information and notes required by GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for fair presentation of our financial position and results of operations have been included. The Company’s fiscal year ends on December 31 and interim results are not necessarily indicative of results for a full year or any other interim period. The condensed consolidated balance sheet at December 31, 2016 has been derived from the audited financial statements as of that date. The information contained in these condensed consolidated financial statements should be read in conjunction with the Company’s consolidated financial statements and notes thereto for the fiscal year ended December 31, 2016 included in the Company’s Annual Report on Form 10-K filed with the Securities and Exchange Commission (the “SEC”) on February 24, 2017. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could differ from those estimates. Certain reclassifications have been made to prior years to conform to the current year presentation.

Recently Issued Accounting Standards	9 Months Ended
Recently Issued Accounting Standards	Sep. 30, 2017
Accounting Changes and Error Corrections [Abstract]
Recently Issued Accounting Standards	2. Recently Issued Accounting Standards In August 2017, the Financial Accounting Standards Board (the “FASB”) issued Accounting Standards Update (“ASU”) 2017-12, “Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities” (“ASU 2017-12”). ASU 2017-12 amends the hedge accounting model to enable entities to better portray the economics of their risk management activities in the financial statements and simplifies the application of hedge accounting in certain situations. ASU 2017-12 is effective for fiscal years, and interim periods within those years, beginning after December 15, 2018. Early adoption is permitted. Management is evaluating the impact of ASU 2017-12 on the Company’s consolidated financial statements. In January 2017, the FASB issued ASU 2017-04, “Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment” (“ASU 2017-04”). ASU 2017-04 simplifies the measurement of goodwill by eliminating the requirement to calculate the implied fair value of goodwill (step 2 of the current impairment test) to measure the goodwill impairment charge. Instead, entities will record impairment charges based on the excess of a reporting unit’s carrying amount over its fair value. ASU 2017-04 is effective for fiscal years beginning after December 15, 2019. Early adoption is permitted. Management is evaluating the impact of ASU 2017-04 on the Company’s consolidated financial statements. In March 2016, the FASB issued ASU 2016-09, “Improvements to Employee Share-Based Payment Accounting” (“ASU 2016-09”). ASU 2016-09 includes multiple provisions intended to simplify various aspects of the accounting for share-based payments. ASU 2016-09 is effective for fiscal years, and interim periods within those years, beginning after December 15, 2016. The Company adopted ASU 2016-09 as of January 1, 2017 as described in Note 10 – Income Taxes. In March 2016, the FASB issued ASU 2016-02, “Leases” (“ASU 2016-02”). ASU 2016-02’s core principle is to increase transparency and comparability among organizations by recognizing lease assets and liabilities on the balance sheet and disclosing key information. ASU 2016-02 is effective for fiscal years, and interim periods within those years, beginning after December 15, 2018. Additionally, ASU 2016-02 would permit both public and nonpublic organizations to adopt the new standard early. Management believes the primary effect of adopting the new standard will be to record right-of-use assets and obligations for current operating leases. In May 2014, the FASB and the International Accounting Standards Board issued ASU 2014-09, “Revenue from Contracts with Customers (Topic 606)” (“ASU 2014-09”). ASU 2014-09’s core principle is that a company will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. ASU 2014-09 requires companies to exercise more judgment and recognize revenue in accordance with the standard’s core principle by applying the following five steps: Step 1: Identify the contract with a customer. Step 2: Identify the performance obligations in the contract. Step 3: Determine the transaction price. Step 4: Allocate the transaction price to the performance obligations in the contract. Step 5: Recognize revenue when (or as) the entity satisfies a performance obligation. ASU 2014-09 also includes a cohesive set of quantitative and qualitative disclosure requirements about the nature, amount, timing, and uncertainty of revenue and cash flows arising from the entity’s contracts with customers. ASU 2014-09 is effective for fiscal years, and interim periods within those years, beginning after December 15, 2017. Additionally, ASU 2014-09 would permit both public and nonpublic organizations to adopt the new revenue standard early, but not before the original public organization effective date (that is, annual periods beginning after December 15, 2016). ASU 2014-09 requires retrospective application using either a full retrospective adoption or a modified retrospective adoption approach. Full retrospective adoption requires entities to apply the standard as if it had been in effect since the inception of all its contracts with customers presented in the financial statements. Modified retrospective adoption requires entities to apply the standard retrospectively to the most current period presented in the financial statements, requiring the cumulative effect of the retrospective application as an adjustment to the opening balance of retained earnings at the date of initial application. The Company continues to evaluate and may adopt the full retrospective method. The Company does not plan to early adopt ASU 2014-09. Additionally, the Company anticipates that, as a result of certain changes required by ASU 2014-09, the majority of its provision for doubtful accounts will be recorded as a direct reduction to revenue instead of being presented as a separate line item. Management is continuing to evaluate the impact of ASU 2014-09 on the Company’s consolidated financial statements.

Earnings Per Share

9 Months Ended

Sep. 30, 2017

Earnings Per Share [Abstract]

Earnings Per Share

3. Earnings Per Share

Basic and diluted earnings per share are calculated in accordance with the FASB Standards Codification Topic 260, “Earnings Per Share,” based on the weighted-average number of shares outstanding in each period and dilutive stock options, unvested shares and warrants, to the extent such securities have a dilutive effect on earnings per share.

The following table sets forth the computation of basic and diluted earnings per share for the three and nine months ended September 30, 2017 and 2016 (in thousands except per share amounts):


	Three Months Ended September 30,					Nine Months Ended September 30,
	2017		2016			2017		2016
Numerator:
Net income (loss) attributable to Acadia Healthcare Company, Inc.	$	45,618	$	(117,808	)	$	130,206	$	(35,675	)

Denominator:
Weighted average shares outstanding for basic earnings per share		87,017		86,618			86,912		85,376
Effect of dilutive instruments		155		—			126		—

Shares used in computing diluted earnings per common share		87,172		86,618			87,038		85,376

Earnings per share attributable to Acadia Healthcare Company, Inc. stockholders:
Basic	$	0.52	$	(1.36	)	$	1.50	$	(0.42	)

Diluted	$	0.52	$	(1.36	)	$	1.50	$	(0.42	)

Approximately 1.0 million and 0.2 million shares of common stock issuable upon exercise of outstanding stock option awards were excluded from the calculation of diluted earnings per share for the three months ended September 30, 2017 and 2016, respectively, because their effect would have been anti-dilutive. Approximately 1.5 million and 0.3 million shares of common stock issuable upon exercise of outstanding stock option awards were excluded from the calculation of diluted earnings per share for the nine months ended September 30, 2017 and 2016, respectively, because their effect would have been anti-dilutive.

Acquisitions

9 Months Ended

Sep. 30, 2017

Business Combinations [Abstract]

Acquisitions

4. Acquisitions

2016 U.S. Acquisitions

On June 1, 2016, the Company completed the acquisition of Pocono Mountain Recovery Center (“Pocono Mountain”), an inpatient psychiatric facility with 108 beds located in Henryville, Pennsylvania, for cash consideration of approximately $25.4 million.

On May 1, 2016, the Company completed the acquisition of TrustPoint Hospital (“TrustPoint”), an inpatient psychiatric facility with 100 beds located in Murfreesboro, Tennessee, for cash consideration of approximately $62.7 million.

On April 1, 2016, the Company completed the acquisition of Serenity Knolls (“Serenity Knolls”), an inpatient psychiatric facility with 30 beds located in Forest Knolls, California, for cash consideration of approximately $10.0 million.

Priory

On February 16, 2016, the Company completed the acquisition of Priory Group No. 1 Limited (“Priory”) for a total purchase price of approximately $2.2 billion, including cash consideration of approximately $1.9 billion and the issuance of 4,033,561 shares of its common stock to shareholders of Priory. Priory was the leading independent provider of behavioral healthcare services in the U.K. operating 324 facilities with approximately 7,100 beds at the acquisition date.

The Competition and Markets Authority (the “CMA”) in the U.K. reviewed the Company’s acquisition of Priory. On July 14, 2016, the CMA announced that the Company’s acquisition of Priory was referred for a phase 2 investigation unless the Company offered acceptable undertakings to address the CMA’s competition concerns relating to the provision of behavioral healthcare services in certain markets. On July 28, 2016, the CMA announced that the Company had offered undertakings to address the CMA’s concerns and that, in lieu of a phase 2 investigation, the CMA would consider the Company’s undertakings.

On October 18, 2016, the Company signed a definitive agreement with BC Partners (“BC Partners”) for the sale of 21 existing U.K. behavioral health facilities and one de novo behavioral health facility with an aggregate of approximately 1,000 beds (collectively, the “U.K. Disposal Group”). On November 10, 2016, the CMA accepted the Company’s undertakings to sell the U.K. Disposal Group to BC Partners and confirmed that the divestiture satisfied the CMA’s concerns about the impact of the Company’s acquisition of Priory on competition for the provision of behavioral healthcare services in certain markets in the U.K. As a result of the CMA’s acceptance of the undertakings, the Company’s acquisition of Priory was not referred for a phase 2 investigation. On November 30, 2016, the Company completed the sale of the U.K. Disposal Group to BC Partners for £320 million cash (the “U.K. Divestiture”).

In conjunction with the sale, the Company recorded a loss on divestiture of $174.7 million in the consolidated statements of operations for the three and nine months ended September 30, 2016. The loss on divestiture consisted of an allocation of goodwill to the U.K. Disposal Group of $106.9 million, loss on the sale of properties of $42.2 million and estimated transaction-related expenses of $25.6 million. The allocation of goodwill was based on the fair value of the U.K. Disposal Group relative to the total fair value of the Company’s U.K. Facilities segment.

Summary of Acquisitions

The Company selectively seeks opportunities to expand and diversify its base of operations by acquiring additional facilities. Approximately $31.5 million of the goodwill associated with domestic acquisitions completed in 2016 is deductible for federal income tax purposes. The fair values of assets acquired and liabilities assumed, at the corresponding acquisition dates, during the year ended December 31, 2016 in connection with the Priory, Serenity Knolls, TrustPoint and Pocono Mountain acquisitions (collectively the “2016 Acquisitions”) were as follows (in thousands):


	Priory		Other		Total
Cash	$	10,253	$	2,488	$	12,741
Accounts receivable		57,832		4,264		62,096
Prepaid expenses and other current assets		7,921		103		8,024
Property and equipment		1,598,156		35,400		1,633,556
Goodwill		679,265		96,052		775,317
Intangible assets		23,200		338		23,538
Other assets		8,862		47		8,909

Total assets acquired		2,385,489		138,692		2,524,181
Accounts payable		24,203		749		24,952
Accrued salaries and benefits		39,588		918		40,506
Other accrued expenses		48,305		391		48,696
Deferred tax liabilities – noncurrent		56,462		269		56,731
Long-term debt		1,348,389		—		1,348,389
Other liabilities		61,311		30,243		91,554

Total liabilities assumed		1,578,258		32,570		1,610,828

Net assets acquired	$	807,231	$	106,122	$	913,353

Other

The qualitative factors comprising the goodwill acquired in the 2016 Acquisitions include efficiencies derived through synergies expected by the elimination of certain redundant corporate functions and expenses, the ability to leverage call center referrals to a broader provider base, coordination of services provided across the combined network of facilities, achievement of operating efficiencies by benchmarking performance, and applying best practices throughout the combined companies.

Transaction-related expenses comprised the following costs for the three and nine months ended September 30, 2017 and 2016 (in thousands):


	Three Months Ended September 30,				Nine Months Ended September 30,
	2017		2016		2017		2016
Legal, accounting and other costs	$	3,845	$	1,111	$	7,286	$	17,212
Severance and contract termination costs		1,820		—		11,550		1,421
Advisory and financing commitment fees		—		—		—		14,850

	$	5,665	$	1,111	$	18,836	$	33,483

Other Intangible Assets

9 Months Ended

Sep. 30, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Other Intangible Assets

5. Other Intangible Assets

Other identifiable intangible assets and related accumulated amortization consisted of the following as of September 30, 2017 and December 31, 2016 (in thousands):


	Gross Carrying Amount				Accumulated Amortization
	September 30, 2017		December 31, 2016		September 30, 2017			December 31, 2016
Intangible assets subject to amortization:
Contract intangible assets	$	2,100	$	2,100	$	(2,100	)	$	(2,100	)
Non-compete agreements		1,147		1,147		(1,147	)		(1,147	)

		3,247		3,247		(3,247	)		(3,247	)
Intangible assets not subject to amortization:
Licenses and accreditations		12,263		12,228		—			—
Trade names		60,427		57,538		—			—
Certificates of need		14,261		13,544		—			—

		86,951		83,310		—			—

Total	$	90,198	$	86,557	$	(3,247	)	$	(3,247	)

Amortization expense related to definite-lived intangible assets was $0.1 million and $0.3 million for the three months and nine months ended September 30, 2016, respectively. As of December 31, 2016, all of the Company’s defined-lived intangible assets were fully amortized. The Company’s licenses and accreditations, trade names and certificate of need intangible assets have indefinite lives and are, therefore, not subject to amortization.

Property and Equipment

9 Months Ended

Sep. 30, 2017

Property, Plant and Equipment [Abstract]

Property and Equipment

6. Property and Equipment

Property and equipment consists of the following as of September 30, 2017 and December 31, 2016 (in thousands):


	September 30, 2017			December 31, 2016
Land	$	445,598		$	411,331
Building and improvements		2,273,128			2,031,819
Equipment		377,857			318,020
Construction in progress		181,029			157,114

		3,277,612			2,918,284
Less accumulated depreciation		(311,397	)		(214,589	)

Property and equipment, net	$	2,966,215		$	2,703,695

Long-Term Debt

9 Months Ended

Sep. 30, 2017

Debt Disclosure [Abstract]

Long-Term Debt

7. Long-Term Debt

Long-term debt consisted of the following (in thousands):


	September 30, 2017			December 31, 2016
Amended and Restated Senior Credit Facility:
Senior Secured Term A Loans	$	385,000		$	400,000
Senior Secured Term B Loans		1,424,538			1,435,450
Senior Secured Revolving Line of Credit		—			—
6.125% Senior Notes due 2021		150,000			150,000
5.125% Senior Notes due 2022		300,000			300,000
5.625% Senior Notes due 2023		650,000			650,000
6.500% Senior Notes due 2024		390,000			390,000
9.0% and 9.5% Revenue Bonds		22,175			22,175
Less: unamortized debt issuance costs, discount and premium		(52,762	)		(59,816	)

		3,268,951			3,287,809
Less: current portion		(34,805	)		(34,805	)

Long-term debt	$	3,234,146		$	3,253,004

Amended and Restated Senior Credit Facility

The Company entered into a senior secured credit facility (the “Senior Secured Credit Facility”) on April 1, 2011. On December 31, 2012, the Company entered into an Amended and Restated Credit Agreement (the “Amended and Restated Credit Agreement”) which amended and restated the Senior Secured Credit Facility (the “Amended and Restated Senior Credit Facility”). The Company has amended the Amended and Restated Credit Agreement from time to time as described in the Company’s prior filings with the SEC.

On January 25, 2016, the Company entered into the Ninth Amendment (the “Ninth Amendment”) to the Amended and Restated Credit Agreement. The Ninth Amendment modified certain definitions and provided increased flexibility to the Company in terms of its financial covenants. The Company’s baskets for permitted investments were also increased to provide increased flexibility for it to invest in non-wholly owned subsidiaries, joint ventures and foreign subsidiaries. The Company may now invest in non-wholly owned subsidiaries and joint ventures up to 10.0% of the Company and its subsidiaries’ total assets in any four consecutive fiscal quarter period, and up to 12.5% of the Company and its subsidiaries’ total assets during the term of the Amended and Restated Credit Agreement. The Company may also invest in foreign subsidiaries that are not loan parties up to 10% of the Company and its subsidiaries’ total assets in any consecutive four fiscal quarter period, and up to 15% of the Company and its subsidiaries’ total assets during the term of the Amended and Restated Credit Agreement. The foregoing permitted investments are subject to an aggregate cap of 25% of the Company and its subsidiaries’ total assets in any fiscal year.

On February 16, 2016, the Company entered into a Second Incremental Facility Amendment (the “Second Incremental Amendment”) to the Amended and Restated Credit Agreement. The Second Incremental Amendment activated a new $955.0 million incremental Term Loan B facility (the “New TLB Facility”) and added $135.0 million to the Term Loan A facility (the “TLA Facility”) to the Amended and Restated Senior Credit Facility, subject to limited conditionality provisions. Borrowings under the New TLB Facility were used to fund a portion of the purchase price for the acquisition of Priory and the fees and expenses for such acquisition and the related financing transactions. Borrowings under the TLA Facility were used to pay down the majority of our $300.0 million revolving credit facility.

On May 26, 2016, the Company entered into a Tranche B-1 Repricing Amendment (the “Tranche B-1 Repricing Amendment”) to the Amended and Restated Credit Agreement. The Tranche B-1 Repricing Amendment reduced the Applicable Rate with respect to the $500.0 million incremental Term Loan B facility (the “Existing TLB Facility”) from 3.5% to 3.0% in the case of Eurodollar Rate loans and 2.5% to 2.0% in the case of Base Rate Loans.

On September 21, 2016, the Company entered into a Tranche B-2 Repricing Amendment (the “Tranche B-2 Repricing Amendment”) to the Amended and Restated Credit Agreement. The Tranche B-2 Repricing Amendment reduced the Applicable Rate with respect to the New TLB Facility from 3.75% to 3.0% in the case of Eurodollar Rate loans and 2.75% to 2.0% in the case of Base Rate Loans. In connection with the Tranche B-2 Repricing Amendment, the Company recorded a debt extinguishment charge of $3.4 million, including the discount and write-off of deferred financing costs, which was recorded in debt extinguishment costs in the condensed consolidated statements of operations.

On November 22, 2016, the Company entered into a Tenth Amendment (the “Tenth Amendment”) to the Amended and Restated Credit Agreement. The Tenth Amendment, among other things, (i) amended the negative covenant regarding dispositions, (ii) modified the collateral package to release any real property with a fair market value of less than $5.0 million and (iii) changed certain investment, indebtedness and lien baskets.

On November 30, 2016, the Company entered into a Refinancing Facilities Amendment (the “Refinancing Amendment”) to the Amended and Restated Credit Agreement. The Refinancing Amendment increased the Company’s line of credit on its revolving credit facility to $500.0 million from $300.0 million and reduced its TLA Facility to $400.0 million from $600.6 million (together, the “Refinancing Facilities”). In addition, the Refinancing Amendment extended the maturity date for the Refinancing Facilities to November 30, 2021 from February 13, 2019, and lowered the Company’s effective interest rate on the line of credit on its revolving credit facility and TLA Facility by 50 basis points. In connection with the Refinancing Amendment, the Company recorded a debt extinguishment charge of $0.8 million, including the write-off of deferred financing costs, which was recorded in debt extinguishment in the condensed consolidated statements of operations.

On May 10, 2017, the Company entered into a Third Repricing Amendment (the “Third Repricing Amendment”) to the Amended and Restated Credit Agreement. The Third Repricing Amendment reduced the Applicable Rate with respect to the Existing TLB Facility and the New TLB Facility from 3.0% to 2.75% in the case of Eurodollar Rate loans and from 2.0% to 1.75% in the case of Base Rate Loans. In connection with the Third Repricing Amendment, the Company recorded a debt extinguishment charge of $0.8 million, including the discount and write-off of deferred financing costs, which was recorded in debt extinguishment costs in the condensed consolidated statements of operations.

The Company had $493.5 million of availability under the revolving line of credit and had standby letters of credit outstanding of $6.5 million related to security for the payment of claims required by its workers’ compensation insurance program as of September 30, 2017. Borrowings under the revolving line of credit are subject to customary conditions precedent to borrowing. The Amended and Restated Credit Agreement requires quarterly term loan principal repayments of our TLA Facility of $5.0 million for September 30, 2017 to December 31, 2019, $7.5 million for March 31, 2020 to December 31, 2020, and $10.0 million for March 31, 2021 to September 30, 2021, with the remaining principal balance of the TLA Facility due on the maturity date of November 30, 2021. The Company is required to repay the Existing TLB Facility in equal quarterly installments of $1.3 million on the last business day of each March, June, September and December, with the outstanding principal balance of the Existing TLB Facility due on February 11, 2022. The Company is required to repay the New TLB Facility in equal quarterly installments of approximately $2.4 million on the last business day of each March, June, September and December, with the outstanding principal balance of the TLB Facility due on February 16, 2023.

Borrowings under the Amended and Restated Senior Credit Facility are guaranteed by each of the Company’s wholly-owned domestic subsidiaries (other than certain excluded subsidiaries) and are secured by a lien on substantially all of the assets of the Company and such subsidiaries. Borrowings with respect to the TLA Facility and the Company’s revolving credit facility (collectively, “Pro Rata Facilities”) under the Amended and Restated Credit Agreement bear interest at a rate tied to the Company’s Consolidated Leverage Ratio (defined as consolidated funded debt net of up to $40.0 million of unrestricted and unencumbered cash to consolidated EBITDA, in each case as defined in the Amended and Restated Credit Agreement). The Applicable Rate (as defined in the Amended and Restated Credit Agreement) for the Pro Rata Facilities was 2.75% for Eurodollar Rate Loans (as defined in the Amended and Restated Credit Agreement) and 1.75% for Base Rate Loans (as defined in the Amended and Restated Credit Agreement) at September 30, 2017. Eurodollar Rate Loans with respect to the Pro Rata Facilities bear interest at the Applicable Rate plus the Eurodollar Rate (as defined in the Amended and Restated Credit Agreement) (based upon the LIBOR Rate (as defined in the Amended and Restated Credit Agreement) prior to commencement of the interest rate period). Base Rate Loans with respect to the Pro Rata Facilities bear interest at the Applicable Rate plus the highest of (i) the federal funds rate plus 0.50%, (ii) the prime rate and (iii) the Eurodollar Rate plus 1.0%. As of September 30, 2017, the Pro Rata Facilities bore interest at a rate of LIBOR plus 2.75%. In addition, the Company is required to pay a commitment fee on undrawn amounts under the revolving line of credit.

The Amended and Restated Credit Agreement requires the Company and its subsidiaries to comply with customary affirmative, negative and financial covenants, including a fixed charge coverage ratio, consolidated leverage ratio and senior secured leverage ratio. The Company may be required to pay all of its indebtedness immediately if it defaults on any of the numerous financial or other restrictive covenants contained in any of its material debt agreements. As of September 30, 2017, the Company was in compliance with such covenants.

Senior Notes

6.125% Senior Notes due 2021

On March 12, 2013, the Company issued $150.0 million of 6.125% Senior Notes due 2021 (the “6.125% Senior Notes”). The 6.125% Senior Notes mature on March 15, 2021 and bear interest at a rate of 6.125% per annum, payable semi-annually in arrears on March 15 and September 15 of each year.

5.125% Senior Notes due 2022

On July 1, 2014, the Company issued $300.0 million of 5.125% Senior Notes due 2022 (the “5.125% Senior Notes”). The 5.125% Senior Notes mature on July 1, 2022 and bear interest at a rate of 5.125% per annum, payable semi-annually in arrears on January 1 and July 1 of each year.

5.625% Senior Notes due 2023

On February 11, 2015, the Company issued $375.0 million of 5.625% Senior Notes due 2023 (the “5.625% Senior Notes”). On September 21, 2015, the Company issued $275.0 million of additional 5.625% Senior Notes. The additional notes formed a single class of debt securities with the 5.625% Senior Notes issued in February 2015. Giving effect to this issuance, the Company has outstanding an aggregate of $650.0 million of 5.625% Senior Notes. The 5.625% Senior Notes mature on February 15, 2023 and bear interest at a rate of 5.625% per annum, payable semi-annually in arrears on February 15 and August 15 of each year.

6.500% Senior Notes due 2024

On February 16, 2016, the Company issued $390.0 million of 6.500% Senior Notes due 2024 (the “6.500% Senior Notes”). The 6.500% Senior Notes mature on March 1, 2024 and bear interest at a rate of 6.500% per annum, payable semi-annually in arrears on March 1 and September 1 of each year, beginning on September 1, 2016.

The indentures governing the 6.125% Senior Notes, 5.125% Senior Notes, 5.625% Senior Notes and 6.500% Senior Notes (together, the “Senior Notes”) contain covenants that, among other things, limit the Company’s ability and the ability of its restricted subsidiaries to: (i) pay dividends, redeem stock or make other distributions or investments; (ii) incur additional debt or issue certain preferred stock; (iii) transfer or sell assets; (iv) engage in certain transactions with affiliates; (v) create restrictions on dividends or other payments by the restricted subsidiaries; (vi) merge, consolidate or sell substantially all of the Company’s assets; and (vii) create liens on assets.

The Senior Notes issued by the Company are guaranteed by each of the Company’s subsidiaries that guarantee the Company’s obligations under the Amended and Restated Senior Credit Facility. The guarantees are full and unconditional and joint and several.

The Company may redeem the Senior Notes at its option, in whole or part, at the dates and amounts set forth in the indentures.

9.0% and 9.5% Revenue Bonds

On November 11, 2012, in connection with the acquisition of The Pavilion at HealthPark, LLC (“Park Royal”), the Company assumed debt of $23.0 million. The fair market value of the debt assumed was $25.6 million and resulted in a debt premium balance being recorded as of the acquisition date. The debt consisted of $7.5 million and $15.5 million of Lee County (Florida) Industrial Development Authority Healthcare Facilities Revenue Bonds, Series 2010 with stated interest rates of 9.0% and 9.5% (“9.0% and 9.5% Revenue Bonds”), respectively. The 9.0% bonds in the amount of $7.5 million have a maturity date of December 1, 2030 and require yearly principal payments beginning in 2013. The 9.5% bonds in the amount of $15.5 million have a maturity date of December 1, 2040 and require yearly principal payments beginning in 2031. The principal payments establish a bond sinking fund to be held with the trustee and shall be sufficient to redeem the principal amounts of the 9.0% and 9.5% Revenue Bonds on their respective maturity dates. As of September 30, 2017 and December 31, 2016, $2.3 million was recorded within other assets on the condensed consolidated balance sheets related to the debt service reserve fund requirements. The yearly principal payments, which establish a bond sinking fund, will increase the debt service reserve fund requirements. The bond premium amount of $2.6 million is amortized as a reduction of interest expense over the life of the revenue bonds using the effective interest method.

Equity Offerings	9 Months Ended
Equity Offerings	Sep. 30, 2017
Equity [Abstract]
Equity Offerings	8. Equity Offerings *Common Stock* On March 3, 2016, the Company held a Special Meeting of Stockholders, where the Company’s stockholders approved an amendment to the Company’s Amended and Restated Certificate of Incorporation to increase the number of authorized shares of Common Stock from 90,000,000 to 180,000,000 (the “Amendment”). On March 3, 2016, the Company filed the Amendment with the Secretary of State of the State of Delaware. *Equity Offerings* On January 12, 2016, the Company completed the offering of 11,500,000 shares of common stock (including shares sold pursuant to the exercise of the over-allotment option that the Company granted to the underwriters as part of the offering) at a price of $61.00 per share. The net proceeds to the Company from the sale of the shares, after deducting the underwriting discount of $15.8 million and additional offering-related costs of $0.7 million, were $685.0 million. The Company used the net offering proceeds to fund a portion of the purchase price for the acquisition of Priory. On February 16, 2016, the Company completed its acquisition of Priory for a total purchase price of approximately $2.2 billion, including total cash consideration of approximately $1.9 billion and the issuance of 4,033,561 shares of common stock.

Equity-Based Compensation

9 Months Ended

Sep. 30, 2017

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Equity-Based Compensation

9. Equity-Based Compensation

Equity Incentive Plans

The Company issues stock-based awards, including stock options, restricted stock and restricted stock units, to certain officers, employees and non-employee directors under the Acadia Healthcare Company, Inc. Incentive Compensation Plan (the “Equity Incentive Plan”). As of September 30, 2017, a maximum of 8,200,000 shares of the Company’s common stock were authorized for issuance as stock options, restricted stock and restricted stock units or other share-based compensation under the Equity Incentive Plan, of which 4,490,249 were available for future grant. Stock options may be granted for terms of up to ten years. The Company recognizes expense on all share-based awards on a straight-line basis over the requisite service period of the entire award. Grants to employees generally vest in annual increments of 25% each year, commencing one year after the date of grant. The exercise prices of stock options are equal to the most recent closing price of the Company’s common stock on the date of grant.

The Company recognized $4.2 million and $7.1 million in equity-based compensation expense for the three months ended September 30, 2017 and 2016, respectively, and $19.0 million and $21.0 million for the nine months ended September 30, 2017 and 2016, respectively. As of September 30, 2017, there was $50.3 million of unrecognized compensation expense related to unvested options, restricted stock and restricted stock units, which is expected to be recognized over the remaining weighted average vesting period of 1.2 years. As of September 30, 2017, there were no warrants outstanding. The Company recognized a deferred income tax benefit of $1.5 million and $2.9 million for the three months ended September 30, 2017 and 2016, respectively, related to equity-based compensation expense. The Company recognized a deferred income tax benefit of $7.3 million and $8.3 million for the nine months ended September 30, 2017 and 2016, respectively, related to equity-based compensation expense.

Stock option activity during 2016 and 2017 was as follows (aggregate intrinsic value in thousands):


	Number of Options			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value
Options outstanding at January 1, 2016		694,743		$	42.87		7.70	$	20,717
Options granted		503,850			57.98		9.28		297
Options exercised		(57,397	)		31.92		N/A		1,530
Options cancelled		(140,250	)		57.13		N/A		N/A

Options outstanding at December 31, 2016		1,000,946			49.42		7.80		8,166
Options granted		236,600			43.11		9.49		382
Options exercised		(81,992	)		26.48		N/A		1,528
Options cancelled		(173,988	)		54.73		N/A		N/A

Options outstanding at September 30, 2017		981,566		$	47.47		7.63	$	4,648

Options exercisable at December 31, 2016		288,959		$	42.81		6.22	$	6,111

Options exercisable at September 30, 2017		407,571		$	41.02		6.20	$	4,172

Restricted stock activity during 2016 and 2017 was as follows:


	Number of Shares			Weighted Average Grant-Date Fair Value
Unvested at January 1, 2016		944,562		$	52.74
Granted		387,347			55.38
Cancelled		(122,178	)		57.02
Vested		(365,312	)		47.18

Unvested at December 31, 2016		844,419		$	55.76
Granted		371,924			43.22
Cancelled		(124,743	)		55.42
Vested		(275,294	)		53.78

Unvested at September 30, 2017		816,306		$	50.77

Restricted stock unit activity during 2016 and 2017 was as follows:


	Number of Units			Weighted Average Grant-Date Fair Value
Unvested at January 1, 2016		218,084		$	56.97
Granted		230,750			56.95
Cancelled		—			—
Vested		(175,235	)		52.71

Unvested at December 31, 2016		273,599		$	59.68
Granted		219,840			43.23
Cancelled		—			—
Vested		(132,530	)		58.67

Unvested at September 30, 2017		360,909		$	50.04

The grant-date fair value of the Company’s stock options is estimated using the Black-Scholes option pricing model. The following table summarizes the grant-date fair value of options and the assumptions used to develop the fair value estimates for options granted during the nine months ended September 30, 2017 and year ended December 31, 2016:


	September 30, 2017			December 31, 2016
Weighted average grant-date fair value of options	$	14.67		$	18.96
Risk-free interest rate		2.0	%		1.4	%
Expected volatility		33	%		33	%
Expected life (in years)		5.5			5.5

The Company’s estimate of expected volatility for stock options is based upon the volatility of guideline companies given the lack of sufficient historical trading experience of the Company’s common stock. The risk-free interest rate is the approximate yield on U. S. Treasury Strips having a life equal to the expected option life on the date of grant. The expected life is an estimate of the number of years an option will be held before it is exercised.

Income Taxes	9 Months Ended
Income Taxes	Sep. 30, 2017
Income Tax Disclosure [Abstract]
Income Taxes	10. Income Taxes The Company adopted ASU 2016-09 as of January 1, 2017, which changes how the Company accounts for share-based awards for tax purposes. Income tax effects of share-based awards are now recognized in the income statement, instead of through equity, when the awards vest. Excess tax benefits/deficiencies are generated when the deduction for tax purposes is greater/less than the compensation cost for financial reporting purposes. Upon adoption of ASU 2016-09, the Company no longer records excess tax benefits/deficiencies in additional paid-in capital as a component of equity. Instead, excess tax benefits/deficiencies are included in the provision for income taxes on the condensed consolidated statements of operations. These changes are recorded prospectively as of January 1, 2017, which resulted in an increase in our income tax provision of $1.7 million, or an increase in the effective tax rate of 1.0%, for the nine months ended September 30, 2017. Prior periods have not been adjusted. An adjustment for prior period excess tax benefits of $8.6 million is recorded as a cumulative-effect adjustment in retained earnings at September 30, 2017 as the Company adopted this amendment using the modified transition method. Excess tax benefits were previously required to be included in financing activities on the condensed consolidated statement of cash flows and are now required to be included in operating activities. The changes to the condensed consolidated statement of cash flows are recorded prospectively as of January 1, 2017. Additionally, the Company has elected not to adjust its policy on accounting for forfeitures and will continue to estimate forfeiture rates. The provision for income taxes for the three months ended September 30, 2017 and 2016 reflects effective tax rates of 26.0% and (2.1)%, respectively. The provision for income taxes for the nine months ended September 30, 2017 and 2016 reflects effective tax rates of 26.3% and (292.8)%, respectively. The increase in the effective tax rate for the three and nine months ended September 30, 2017 was primarily attributable to the disparity in the accounting treatment and the tax treatment of the U.K. Divestiture, the reduction in ongoing U.K. earnings as a result of the U.K. Divestiture, changes in the foreign exchange rate between U.S. dollars (“USD”) and British pounds (“GBP”) and the adoption of ASU 2016-09.

Derivative Instruments	9 Months Ended
Derivative Instruments	Sep. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments	11. Derivative Instruments The Company entered into foreign currency forward contracts during the nine months ended September 30, 2017 and the three and nine months ended 2016 in connection with (i) acquisitions in the U.K. and (ii) transfers of cash between the U.S. and U.K. under the Company’s cash management and foreign currency risk management programs. Foreign currency forward contracts limit the economic risk of changes in the exchange rate between USD and GBP associated with cash transfers. The foreign currency forward contracts entered into during the three and nine months ended September 30, 2016 resulted in gains of $15 thousand and $0.5 million, respectively, which have been recorded in the condensed consolidated statements of operations. In May 2016, the Company entered into multiple cross currency swap agreements with an aggregate notional amount of $650.0 million to manage foreign currency risk by effectively converting a portion of its fixed-rate USD-denominated senior notes, including the semi-annual interest payments thereunder, to fixed-rate GBP-denominated debt of £449.3 million. The senior notes effectively converted include $150.0 million aggregate principal amount of 6.125% Senior Notes, $300.0 million aggregate principal amount of 5.125% Senior Notes and $200.0 million aggregate principal amount of 5.625% Senior Notes. During the term of the swap agreements, the Company will receive semi-annual interest payments in USD from the counterparties at fixed interest rates, and the Company will make semi-annual interest payments in GBP to the counterparties at fixed interest rates. The interest payments under the cross-currency swap agreements result in £24.7 million of annual cash flows, from the Company’s U.K. business being converted to $35.8 million (at a 1.45 exchange rate). The interest rates applicable to the GBP interest payments are substantially the same as the interest rates in place for the existing USD-denominated debt. At maturity, the Company will repay the principal amounts listed above in GBP and receive the principal amount in USD. The Company has designated the cross currency swap agreements and certain forward contracts entered into during 2016 and the three and nine months ended September 30, 2017 as qualifying hedging instruments and is accounting for these as net investment hedges. The fair value of these derivatives of $26.2 million is recorded as derivative instruments on the condensed consolidated balance sheets. The gains and losses resulting from fair value adjustments to these derivatives are recorded in accumulated other comprehensive loss as the swaps are effective in hedging the designated risk. Cash flows related to these derivatives are included in operating activities in the condensed consolidated statements of cash flows.

Fair Value Measurements

9 Months Ended

Sep. 30, 2017

Fair Value Disclosures [Abstract]

Fair Value Measurements

12. Fair Value Measurements

The carrying amounts reported for cash and cash equivalents, accounts receivable, other current assets, accounts payable and other current liabilities approximate fair value because of the short-term maturity of these instruments. The carrying amounts and fair values of the Company’s Amended and Restated Senior Credit Facility, 6.125% Senior Notes, 5.125% Senior Notes, 5.625% Senior Notes, 6.500% Senior Notes, 9.0% and 9.5% Revenue Bonds, derivative instruments and contingent consideration liabilities as of September 30, 2017 and December 31, 2016 were as follows (in thousands):


	Carrying Amount				Fair Value
	September 30, 2017		December 31, 2016		September 30, 2017		December 31, 2016
Amended and Restated Senior Credit Facility	$	1,778,798	$	1,799,993	$	1,778,798	$	1,799,993
6.125% Senior Notes due 2021	$	147,964	$	147,574	$	152,359	$	152,186
5.125% Senior Notes due 2022	$	295,988	$	295,442	$	306,466	$	293,595
5.625% Senior Notes due 2023	$	641,554	$	640,574	$	673,632	$	640,574
6.500% Senior Notes due 2024	$	381,998	$	381,268	$	410,170	$	389,847
9.0% and 9.5% Revenue Bonds	$	22,648	$	22,959	$	22,648	$	22,959
Derivative instruments	$	26,176	$	73,509	$	26,176	$	73,509
Contingent consideration liabilities	$	—	$	107	$	—	$	107

The Company’s Amended and Restated Senior Credit Facility, 6.125% Senior Notes, 5.125% Senior Notes, 5.625% Senior Notes, 6.500% Senior Notes and 9.0% and 9.5% Revenue Bonds were categorized as Level 2 in the GAAP fair value hierarchy. Fair values were based on trading activity among the Company’s lenders and the average bid and ask price as determined using published rates.

The fair values of the derivative instruments were categorized as Level 2 in the GAAP fair value hierarchy and were based on observable market inputs including applicable exchange rates and interest rates.

The fair value of the contingent consideration liabilities were categorized as Level 3 in the GAAP fair value hierarchy. The contingent consideration liabilities were valued using a probability-weighted discounted cash flow method. This analysis reflected the contractual terms of the purchase agreements and utilized assumptions with regard to future earnings, probabilities of achieving such future earnings and a discount rate.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Commitments and Contingencies	9 Months Ended
Commitments and Contingencies	Sep. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	13. Commitments and Contingencies *Professional and General Liability* A portion of the Company’s professional liability risks is insured through a wholly-owned insurance subsidiary. The Company’s wholly-owned insurance subsidiary insures the Company for professional liability losses up to $78.0 million in the aggregate. The insurance subsidiary has obtained reinsurance with unrelated commercial insurers for professional liability risks of $75.0 million in excess of a retention level of $3.0 million. *Legal Proceedings* The Company is, from time to time, subject to various claims, governmental investigations and regulatory actions that arise in the ordinary course of the Company’s business, including claims for damages for personal injuries, medical malpractice, overpayments, breach of contract, tort and employment related claims. In these actions, plaintiffs request a variety of damages, including, in some instances, punitive and other types of damages that may not be covered by insurance. In the opinion of management, the Company is not currently a party to any proceeding that would individually or in the aggregate have a material adverse effect on the Company’s business, financial condition or results of operations.

Noncontrolling Interests	9 Months Ended
Noncontrolling Interests	Sep. 30, 2017
Noncontrolling Interest [Abstract]
Noncontrolling Interests	14. Noncontrolling Interests Noncontrolling interests in the consolidated financial statements represents the portion of equity held by noncontrolling partners in non-wholly owned subsidiaries the Company controls. At September 30, 2017, certain of these non-wholly owned subsidiaries operated two facilities. The Company owns between 60% and 75% of the equity interests in the entity that owns each facility, and noncontrolling partners own the remaining equity interests. The initial value of the noncontrolling interests is based on the fair value of contributions, and the Company consolidates the operations of each facility based on its equity ownership and its control of the entity. The noncontrolling interests are reflected as redeemable noncontrolling interests on the accompanying consolidated balance sheets based on put rights that could require the Company to purchase the noncontrolling interests upon the occurrence of a change in control.

Other Current Assets

9 Months Ended

Sep. 30, 2017

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Other Current Assets

15. Other Current Assets

Other current assets consisted of the following (in thousands):


	September 30, 2017		December 31, 2016
Other receivables	$	30,910	$	44,975
Prepaid expenses		28,874		27,455
Workers’ compensation deposits – current portion		10,000		10,000
Income taxes receivable		9,472		11,714
Insurance receivable-current portion		6,472		6,472
Inventory		4,698		4,633
Other		1,981		2,288

Other current assets	$	92,407	$	107,537

Other Accrued Liabilities

9 Months Ended

Sep. 30, 2017

Other Liabilities Disclosure [Abstract]

Other Accrued Liabilities

16. Other Accrued Liabilities

Other accrued liabilities consisted of the following (in thousands):


	September 30, 2017		December 31, 2016
Accrued expenses	$	39,610	$	37,323
Unearned income		25,062		28,805
Accrued interest		15,058		33,616
Insurance liability – current portion		11,672		11,672
Income taxes payable		7,384		527
Accrued property taxes		5,257		2,732
Other		7,360		8,283

Other accrued liabilities	$	111,403	$	122,958

Segment Information

9 Months Ended

Sep. 30, 2017

Segment Reporting [Abstract]

Segment Information

17. Segment Information

The Company operates in one line of business, which is operating acute inpatient psychiatric facilities, specialty treatment facilities, residential treatment centers and facilities providing outpatient behavioral healthcare services. As management reviews the operating results of its facilities in the U.S. (the “U.S. Facilities”) and its facilities in the U.K. (the “U.K. Facilities”) separately to assess performance and make decisions, the Company’s operating segments include its U.S. Facilities and U.K. Facilities. At September 30, 2017, the U.S. Facilities included 208 behavioral healthcare facilities with approximately 8,700 beds in 39 states and Puerto Rico, and the U.K. Facilities included 371 behavioral healthcare facilities with approximately 8,700 beds in the U.K.

The following tables set forth the financial information by operating segment, including a reconciliation of Segment EBITDA to income before income taxes (in thousands):


	Three Months Ended September 30,						Nine Months Ended September 30,
	2017			2016			2017			2016
Revenue:
U.S. Facilities	$	453,678		$	431,521		$	1,355,315		$	1,269,994
U.K. Facilities		263,036			303,146			756,489			836,004
Corporate and Other		—			(2	)		—			2,028

	$	716,714		$	734,665		$	2,111,804		$	2,108,026

Segment EBITDA (1):
U.S. Facilities	$	118,744		$	108,810		$	359,250		$	334,230
U.K. Facilities		50,665			67,795			146,941			185,664
Corporate and Other		(17,153	)		(20,767	)		(55,346	)		(60,818	)

	$	152,256		$	155,838		$	450,845		$	459,076


	Three Months Ended September 30,						Nine Months Ended September 30,
	2017			2016			2017			2016
Segment EBITDA (1)	$	152,256		$	155,838		$	450,845		$	459,076
Plus (less):
Equity-based compensation expense		(4,175	)		(7,145	)		(19,007	)		(20,989	)
Debt extinguishment costs		—			(3,411	)		(810	)		(3,411	)
Loss on divestiture		—			(174,739	)		—			(174,739	)
Gain on foreign currency derivatives		—			15			—			523
Transaction-related expenses		(5,665	)		(1,111	)		(18,836	)		(33,483	)
Interest expense, net		(44,515	)		(48,843	)		(130,777	)		(135,315	)
Depreciation and amortization		(36,442	)		(36,418	)		(105,256	)		(101,145	)

Income before income taxes	$	61,459		$	(115,814	)	$	176,159		$	(9,483	)


	U.S. Facilities			U.K. Facilities			Corporate and Other			Consolidated
Goodwill:
Balance at January 1, 2017	$	2,041,795		$	639,393		$	—		$	2,681,188
Foreign currency translation		—			55,260			—			55,260
Purchase price allocation and other		797			(6,883	)		—			(6,086	)

Balance at September 30, 2017	$	2,042,592		$	687,770		$	—		$	2,730,362


	September 30, 2017		December 31, 2016
Assets (2):
U.S. Facilities	$	3,521,080	$	3,382,167
U.K. Facilities		2,615,828		2,441,018
Corporate and Other		205,678		201,541

	$	6,342,586	$	6,024,726

(1)

Segment EBITDA is defined as income before provision for income taxes, equity-based compensation expense, debt extinguishment costs, loss on divestiture, gain on foreign currency derivatives, transaction-related expenses, interest expense and depreciation and amortization. The Company uses Segment EBITDA as an analytical indicator to measure the performance of the Company’s segments and to develop strategic objectives and operating plans for those segments. Segment EBITDA is commonly used as an analytical indicator within the health care industry, and also serves as a measure of leverage capacity and debt service ability. Segment EBITDA should not be considered as a measure of financial performance under GAAP, and the items excluded from Segment EBITDA are significant components in understanding and assessing financial performance. Because Segment EBITDA is not a measurement determined in accordance with GAAP and is thus susceptible to varying calculations, Segment EBITDA, as presented, may not be comparable to other similarly titled measures of other companies.

(2)

Assets include property and equipment for the U.S. Facilities of $1.1 billion, U.K. Facilities of $1.8 billion and corporate and other of $36.7 million at September 30, 2017. Assets include property and equipment for the U.S. Facilities of $1.0 billion, U.K. Facilities of $1.7 billion and corporate and other of $27.1 million at December 31, 2016.

Accumulated Other Comprehensive Loss

9 Months Ended

Sep. 30, 2017

Equity [Abstract]

Accumulated Other Comprehensive Loss

18. Accumulated Other Comprehensive Loss

The components of accumulated other comprehensive loss are as follows (in thousands):


	Foreign Currency Translation Adjustments			Change in Fair Value of Derivative Instruments			Pension Plan			Total
Balance at December 31, 2016	$	(584,081	)	$	40,598		$	(6,087	)	$	(549,570	)
Foreign currency translation gain		189,265			—			(521	)		188,744
Loss on derivative instruments, net of tax of $(18.8) million		—			(24,354	)		—			(24,354	)

Balance at September 30, 2017	$	(394,816	)	$	16,244		$	(6,608	)	$	(385,180	)

Financial Information for the Company and Its Subsidiaries

9 Months Ended

Sep. 30, 2017

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Financial Information for the Company and Its Subsidiaries

19. Financial Information for the Company and Its Subsidiaries

The Company conducts substantially all of its business through its subsidiaries. The 6.125% Senior Notes, 5.125% Senior Notes, 5.625% Senior Notes and 6.500% Senior Notes are jointly and severally guaranteed on an unsecured senior basis by all of the Company’s subsidiaries that guarantee the Company’s obligations under the Amended and Restated Senior Credit Facility. Presented below is condensed consolidating financial information for the Company and its subsidiaries as of September 30, 2017 and December 31, 2016, and for the three and nine months ended September 30, 2017 and 2016. The information segregates the parent company (Acadia Healthcare Company, Inc.), the combined wholly-owned subsidiary guarantors, the combined non-guarantor subsidiaries and eliminations.

Acadia Healthcare Company, Inc.

Condensed Consolidating Balance Sheets

September 30, 2017

(In thousands)


	Parent		Combined Subsidiary Guarantors		Combined Non- Guarantors		Consolidating Adjustments			Total Consolidated Amounts
Current assets:
Cash and cash equivalents	$	—	$	43,714	$	31,947	$	—		$	75,661
Accounts receivable, net		—		230,283		65,473		—			295,756
Other current assets		—		68,978		23,429		—			92,407

Total current assets		—		342,975		120,849		—			463,824
Property and equipment, net		—		1,042,800		1,923,415		—			2,966,215
Goodwill		—		1,936,057		794,305		—			2,730,362
Intangible assets, net		—		57,392		29,559		—			86,951
Deferred tax assets – noncurrent		3,378		—		4,399		(4,088	)		3,689
Derivative instruments		26,176		—		—		—			26,176
Investment in subsidiaries		5,228,165		—		—		(5,228,165	)		—
Other assets		490,535		53,903		8,375		(487,444	)		65,369

Total assets	$	5,748,254	$	3,433,127	$	2,880,902	$	(5,719,697	)	$	6,342,586

Current liabilities:
Current portion of long-term debt	$	34,550	$	—	$	255	$	—		$	34,805
Accounts payable		—		62,655		32,450		—			95,105
Accrued salaries and benefits		—		68,271		31,622		—			99,893
Other accrued liabilities		14,365		12,392		84,646		—			111,403

Total current liabilities		48,915		143,318		148,973		—			341,206
Long-term debt		3,211,754		—		509,836		(487,444	)		3,234,146
Deferred tax liabilities – noncurrent		—		36,341		49,419		(4,088	)		81,672
Other liabilities		—		112,094		67,235		—			179,329

Total liabilities		3,260,669		291,753		775,463		(491,532	)		3,836,353

Redeemable noncontrolling interests		—		—		18,648		—			18,648

Total equity		2,487,585		3,141,374		2,086,791		(5,228,165	)		2,487,585

Total liabilities and equity	$	5,748,254	$	3,433,127	$	2,880,902	$	(5,719,697	)	$	6,342,586

Acadia Healthcare Company, Inc.

Condensed Consolidating Balance Sheets

December 31, 2016

(In thousands)


	Parent		Combined Subsidiary Guarantors		Combined Non- Guarantors		Consolidating Adjustments			Total Consolidated Amounts
Current assets:
Cash and cash equivalents	$	—	$	15,681	$	41,382	$	—		$	57,063
Accounts receivable, net		—		209,124		54,203		—			263,327
Other current assets		—		61,724		45,813		—			107,537

Total current assets		—		286,529		141,398		—			427,927
Property and equipment, net		—		940,880		1,762,815		—			2,703,695
Goodwill		—		1,935,260		745,928		—			2,681,188
Intangible assets, net		—		56,676		26,634		—			83,310
Deferred tax assets – noncurrent		13,522		—		4,606		(14,348	)		3,780
Derivative instruments		73,509		—		—		—			73,509
Investment in subsidiaries		4,885,865		—		—		(4,885,865	)		—
Other assets		493,294		40,480		7,189		(489,646	)		51,317

Total assets	$	5,466,190	$	3,259,825	$	2,688,570	$	(5,389,859	)	$	6,024,726

Current liabilities:
Current portion of long-term debt	$	34,550	$	—	$	255	$	—		$	34,805
Accounts payable		—		49,205		30,829		—			80,034
Accrued salaries and benefits		—		72,835		32,233		—			105,068
Other accrued liabilities		33,616		24,375		64,967		—			122,958

Total current liabilities		68,166		146,415		128,284		—			342,865
Long-term debt		3,230,300		—		512,350		(489,646	)		3,253,004
Deferred tax liabilities – noncurrent		—		40,574		52,294		(14,348	)		78,520
Other liabilities		—		101,938		62,921		—			164,859

Total liabilities		3,298,466		288,927		755,849		(503,994	)		3,839,248

Redeemable noncontrolling interests		—		—		17,754		—			17,754

Total equity		2,167,724		2,970,898		1,914,967		(4,885,865	)		2,167,724

Total liabilities and equity	$	5,466,190	$	3,259,825	$	2,688,570	$	(5,389,859	)	$	6,024,726

Acadia Healthcare Company, Inc.

Condensed Consolidating Statement of Comprehensive Income (Loss)

Three Months Ended September 30, 2017

(In thousands)


	Parent			Combined Subsidiary Guarantors			Combined Non- Guarantors			Consolidating Adjustments			Total Consolidated Amounts
Revenue before provision for doubtful accounts	$	—		$	440,423		$	288,289		$	—		$	728,712
Provision for doubtful accounts		—			(10,310	)		(1,688	)		—			(11,998	)

Revenue		—			430,113			286,601			—			716,714
Salaries, wages and benefits		4,175			225,001			156,386			—			385,562
Professional fees		—			24,385			28,657			—			53,042
Supplies		—			18,843			9,809			—			28,652
Rents and leases		—			8,127			10,922			—			19,049
Other operating expenses		—			55,077			27,251			—			82,328
Depreciation and amortization		—			16,963			19,479			—			36,442
Interest expense, net		15,933			19,304			9,278			—			44,515
Transaction-related expenses		—			2,211			3,454			—			5,665

Total expenses		20,108			369,911			265,236			—			655,255
(Loss) income before income taxes		(20,108	)		60,202			21,365			—			61,459
Equity in earnings of subsidiaries		55,925			—			—			(55,925	)		—
(Benefit from) provision for income taxes		(9,672	)		21,202			4,440			—			15,970

Net income (loss)		45,489			39,000			16,925			(55,925	)		45,489
Net loss attributable to noncontrolling interests		—			—			129			—			129

Net income (loss) attributable to Acadia Healthcare Company, Inc.	$	45,489		$	39,000		$	17,054		$	(55,925	)	$	45,618

Other comprehensive income (loss):
Foreign currency translation gain		—			—			69,622			—			69,622
Loss on derivative instruments		(9,402	)		—			—			—			(9,402	)

Other comprehensive (loss) income		(9,402	)		—			69,622			—			60,220

Comprehensive income (loss) attributable to Acadia Healthcare Company, Inc.	$	36,087		$	39,000		$	86,676		$	(55,925	)	$	105,838

Acadia Healthcare Company, Inc.

Condensed Consolidating Statement of Comprehensive Income (Loss)

Three Months Ended September 30, 2016

(In thousands)


	Parent			Combined Subsidiary Guarantors			Combined Non- Guarantors			Consolidating Adjustments		Total Consolidated Amounts
Revenue before provision for doubtful accounts	$	—		$	420,061		$	324,741		$	—	$	744,802
Provision for doubtful accounts		—			(9,383	)		(754	)		—		(10,137	)

Revenue		—			410,678			323,987			—		734,665
Salaries, wages and benefits		7,145			224,692			176,405			—		408,242
Professional fees		—			21,140			26,547			—		47,687
Supplies		—			19,467			11,088			—		30,555
Rents and leases		—			8,759			10,981			—		19,740
Other operating expenses		—			51,536			28,212			—		79,748
Depreciation and amortization		—			15,105			21,313			—		36,418
Interest expense, net		13,388			19,258			16,197			—		48,843
Debt extinguishment costs		3,411			—			—			—		3,411
Loss on divestiture		—			—			174,739			—		174,739
Gain on foreign currency derivatives		(15	)		—			—			—		(15	)
Transaction-related expenses		—			—			1,111			—		1,111

Total expenses		23,929			359,957			466,593			—		850,479
(Loss) income before income taxes		(23,929	)		50,721			(142,606	)		—		(115,814	)
Equity in earnings of subsidiaries		(99,875	)		—			—			99,875		—
(Benefit from) provision for income taxes		(5,594	)		38,654			(30,664	)		—		2,396

Net (loss) income		(118,210	)		12,067			(111,942	)		99,875		(118,210	)
Net loss attributable to noncontrolling interests		—			—			402			—		402

Net (loss) income attributable to Acadia Healthcare Company, Inc.	$	(118,210	)	$	12,067		$	(111,540	)	$	99,875	$	(117,808	)

Other comprehensive loss:
Foreign currency translation loss		—			—			(89,645	)		—		(89,645	)
Gain on derivative instruments		6,387			—			—			—		6,387

Other comprehensive income (loss)		6,387			—			(89,645	)		—		(83,258	)

Comprehensive (loss) income attributable to Acadia Healthcare Company, Inc.	$	(111,823	)	$	12,067		$	(201,185	)	$	99,875	$	(201,066	)

Acadia Healthcare Company, Inc.

Condensed Consolidating Statement of Comprehensive Income (Loss)

Nine Months Ended September 30, 2017

(In thousands)


	Parent			Combined Subsidiary Guarantors			Combined Non- Guarantors			Consolidating Adjustments			Total Consolidated Amounts
Revenue before provision for doubtful accounts	$	—		$	1,311,937		$	831,759		$	—		$	2,143,696
Provision for doubtful accounts		—			(28,007	)		(3,885	)		—			(31,892	)

Revenue		—			1,283,930			827,874			—			2,111,804
Salaries, wages and benefits		19,007			675,206			451,365			—			1,145,578
Professional fees		—			69,796			72,976			—			142,772
Supplies		—			56,502			28,498			—			85,000
Rents and leases		—			25,139			32,316			—			57,455
Other operating expenses		—			164,596			84,565			—			249,161
Depreciation and amortization		—			48,918			56,338			—			105,256
Interest expense, net		46,392			57,054			27,331			—			130,777
Debt extinguishment costs		810			—			—			—			810
Transaction-related expenses		—			6,219			12,617			—			18,836

Total expenses		66,209			1,103,430			766,006			—			1,935,645
(Loss) income before income taxes		(66,209	)		180,500			61,868			—			176,159
Equity in earnings of subsidiaries		163,931			—			—			(163,931	)		—
(Benefit from) provision for income taxes		(32,178	)		66,124			12,313			—			46,259

Net income (loss)		129,900			114,376			49,555			(163,931	)		129,900
Net loss attributable to noncontrolling interests		—			—			306			—			306

Net income (loss) attributable to Acadia Healthcare Company, Inc.	$	129,900		$	114,376		$	49,861		$	(163,931	)	$	130,206

Other comprehensive income (loss):
Foreign currency translation gain		—			—			188,744			—			188,744
Loss on derivative instruments		(24,354	)		—			—			—			(24,354	)

Other comprehensive (loss) income		(24,354	)		—			188,744			—			164,390

Comprehensive income (loss) attributable to Acadia Healthcare Company, Inc.	$	105,546		$	114,376		$	238,605		$	(163,931	)	$	294,596

Acadia Healthcare Company, Inc.

Condensed Consolidating Statement of Comprehensive Income (Loss)

Nine Months Ended September 30, 2016

(In thousands)


	Parent			Combined Subsidiary Guarantors			Combined Non- Guarantors			Consolidating Adjustments			Total Consolidated Amounts
Revenue before provision for doubtful accounts	$	—		$	1,245,227		$	893,812		$	—		$	2,139,039
Provision for doubtful accounts		—			(28,318	)		(2,695	)		—			(31,013	)

Revenue		—			1,216,909			891,117			—			2,108,026
Salaries, wages and benefits		20,989			648,669			487,899			—			1,157,557
Professional fees		—			66,967			71,003			—			137,970
Supplies		—			57,456			30,993			—			88,449
Rents and leases		—			25,857			29,156			—			55,013
Other operating expenses		—			151,485			79,465			—			230,950
Depreciation and amortization		—			42,072			59,073			—			101,145
Interest expense, net		37,452			57,394			40,469			—			135,315
Debt extinguishment costs		3,411			—			—			—			3,411
Loss on divestiture		—			—			174,739			—			174,739
Gain on foreign currency derivatives		(523	)		—			—			—			(523	)
Transaction-related expenses		—			25,624			7,859			—			33,483

Total expenses		61,329			1,075,524			980,656			—			2,117,509
(Loss) income before income taxes		(61,329	)		141,385			(89,539	)		—			(9,483	)
Equity in earnings of subsidiaries		8,937			—			—			(8,937	)		—
(Benefit from) provision for income taxes		(15,142	)		62,247			(19,338	)		—			27,767

Net (loss) income		(37,250	)		79,138			(70,201	)		(8,937	)		(37,250	)
Net loss attributable to noncontrolling interests		—			—			1,575			—			1,575

Net (loss) income attributable to Acadia Healthcare Company, Inc.	$	(37,250	)	$	79,138		$	(68,626	)	$	(8,937	)	$	(35,675	)

Other comprehensive loss:
Foreign currency translation loss		—			—			(351,528	)		—			(351,528	)
Gain on derivative instruments		30,306			—			—			—			30,306

Other comprehensive income (loss)		30,306			—			(351,528	)		—			(321,222	)

Comprehensive (loss) income attributable to Acadia Healthcare Company, Inc.	$	(6,944	)	$	79,138		$	(420,154	)	$	(8,937	)	$	(356,897	)

Acadia Healthcare Company, Inc.

Condensed Consolidating Statement of Cash Flows

Nine Months Ended September 30, 2017

(In thousands)


	Parent			Combined Subsidiary Guarantors			Combined Non- Guarantors			Consolidating Adjustments			Total Consolidated Amounts
Operating activities:
Net income (loss)	$	129,900		$	114,376		$	49,555		$	(163,931	)	$	129,900
Adjustments to reconcile net income (loss) to net cash (used in) provided by continuing operating activities:
Equity in earnings of subsidiaries		(163,931	)		—			—			163,931			—
Depreciation and amortization		—			48,918			56,338			—			105,256
Amortization of debt issuance costs		7,652			—			(312	)		—			7,340
Equity-based compensation expense		19,007			—			—			—			19,007
Deferred income tax expense		156			22,401			6,859			—			29,416
Debt extinguishment costs		810			—			—			—			810
Other		4,216			1,727			4,729			—			10,672
Change in operating assets and liabilities, net of effect of acquisitions:
Accounts receivable, net		—			(21,183	)		(7,498	)		—			(28,681	)
Other current assets		—			1,126			24,973			—			26,099
Other assets		3,479			(705	)		139			(3,479	)		(566	)
Accounts payable and other accrued liabilities		—			(22,372	)		(4,009	)		—			(26,381	)
Accrued salaries and benefits		—			(4,759	)		(3,178	)		—			(7,937	)
Other liabilities		—			4,084			3,593			—			7,677

Net cash provided by (used in) continuing operating activities		1,289			143,613			131,189			(3,479	)		272,612
Net cash used in discontinued operating activities		—			(1,261	)		—			—			(1,261	)

Net cash provided by (used in) operating activities		1,289			142,352			131,189			(3,479	)		271,351
Investing activities:
Cash paid for capital expenditures		—			(114,130	)		(79,687	)		—			(193,817	)
Cash paid for real estate acquisitions		—			(33,297	)		—			—			(33,297	)
Other		—			(7,984	)		1,922			—			(6,062	)

Net cash used in investing activities		—			(155,411	)		(77,765	)		—			(233,176	)
Financing activities:
Principal payments on long-term debt		(25,913	)		—			(3,479	)		3,479			(25,913	)
Common stock withheld for minimum statutory taxes, net		(3,278	)		—			—			—			(3,278	)
Other		—			1,649			—			—			1,649
Cash provided by (used in) intercompany activity		27,902			39,443			(67,345	)		—			—

Net cash (used in) provided by financing activities		(1,289	)		41,092			(70,824	)		3,479			(27,542	)

Effect of exchange rate changes on cash		—			—			7,965			—			7,965

Net increase in cash and cash equivalents		—			28,033			(9,435	)		—			18,598
Cash and cash equivalents at beginning of the period		—			15,681			41,382			—			57,063

Cash and cash equivalents at end of the period	$	—		$	43,714		$	31,947		$	—		$	75,661

Acadia Healthcare Company, Inc.

Condensed Consolidating Statement of Cash Flows

Nine Months Ended September 30, 2016

(In thousands)


	Parent			Combined Subsidiary Guarantors			Combined Non- Guarantors			Consolidating Adjustments			Total Consolidated Amounts
Operating activities:
Net (loss) income	$	(37,250	)	$	79,138		$	(70,201	)	$	(8,937	)	$	(37,250	)
Adjustments to reconcile net income (loss) to net cash (used in) provided by continuing operating activities:
Equity in earnings of subsidiaries		(8,937	)		—			—			8,937			—
Depreciation and amortization		—			42,072			59,073			—			101,145
Amortization of debt issuance costs		8,035			—			(321	)		—			7,714
Equity-based compensation expense		20,989			—			—			—			20,989
Deferred income tax (benefit) expense		—			26,381			(524	)		—			25,857
Debt extinguishment costs		3,411			—			—			—			3,411
Loss on divestiture		—			—			174,739			—			174,739
Gain on foreign currency derivatives		(523	)		—			—			—			(523	)
Other		—			826			(95	)		—			731
Change in operating assets and liabilities, net of effect of acquisitions:
Accounts receivable, net		—			(26,055	)		13,476			—			(12,579	)
Other current assets		—			(4,901	)		(8,072	)		—			(12,973	)
Other assets		(2,780	)		(818	)		(316	)		2,780			(1,134	)
Accounts payable and other accrued liabilities		—			31,633			(29,566	)		—			2,067
Accrued salaries and benefits		—			3,527			(14,286	)		—			(10,759	)
Other liabilities		—			5,975			(2,229	)		—			3,746

Net cash (used in) provided by continuing operating activities		(17,055	)		157,778			121,678			2,780			265,181
Net cash used in discontinued operating activities		—			(5,524	)		—			—			(5,524	)

Net cash (used in) provided by operating activities		(17,055	)		152,254			121,678			2,780			259,657
Investing activities:
Cash paid for acquisitions, net of cash acquired		—			(103,189	)		(580,096	)		—			(683,285	)
Cash paid for capital expenditures		—			(142,626	)		(107,335	)		—			(249,961	)
Cash paid for real estate acquisitions		—			(26,146	)		(11,801	)		—			(37,947	)
Settlement of foreign currency derivatives		—			523			—			—			523
Other		—			(1,135	)		—			—			(1,135	)

Net cash used in investing activities		—			(272,573	)		(699,232	)		—			(971,805	)
Financing activities:
Borrowings on long-term debt		1,480,000			—			—			—			1,480,000
Borrowings on revolving credit facility		179,000			—			—			—			179,000
Principal payments on revolving credit facility		(166,000	)		—			—			—			(166,000	)
Principal payments on long-term debt		(46,069	)		—			(2,780	)		2,780			(46,069	)
Repayment of assumed debt		(1,348,389	)		—			—			—			(1,348,389	)
Payment of debt issuance costs		(35,748	)		—			—			—			(35,748	)
Issuance of common stock		685,097			—			—			—			685,097
Common stock withheld for minimum statutory taxes, net		(7,917	)		—			—			—			(7,917	)
Other		—			(1,821	)		—			—			(1,821	)
Cash (used in) provided by intercompany activity		(722,919	)		125,313			603,166			(5,560	)		—

Net cash provided by (used in) financing activities		17,055			123,492			600,386			(2,780	)		738,153

Effect of exchange rate changes on cash		—			—			(9,469	)		—			(9,469	)

Net increase in cash and cash equivalents		—			3,173			13,363			—			16,536
Cash and cash equivalents at beginning of the period		—			1,987			9,228			—			11,215

Cash and cash equivalents at end of the period	$	—		$	5,160		$	22,591		$	—		$	27,751

Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2017

Earnings Per Share [Abstract]

Computation of Basic and Diluted Earnings Per Share

The following table sets forth the computation of basic and diluted earnings per share for the three and nine months ended September 30, 2017 and 2016 (in thousands except per share amounts):


	Three Months Ended September 30,					Nine Months Ended September 30,
	2017		2016			2017		2016
Numerator:
Net income (loss) attributable to Acadia Healthcare Company, Inc.	$	45,618	$	(117,808	)	$	130,206	$	(35,675	)

Denominator:
Weighted average shares outstanding for basic earnings per share		87,017		86,618			86,912		85,376
Effect of dilutive instruments		155		—			126		—

Shares used in computing diluted earnings per common share		87,172		86,618			87,038		85,376

Earnings per share attributable to Acadia Healthcare Company, Inc. stockholders:
Basic	$	0.52	$	(1.36	)	$	1.50	$	(0.42	)

Diluted	$	0.52	$	(1.36	)	$	1.50	$	(0.42	)

Acquisitions (Tables)

9 Months Ended

Sep. 30, 2017

Transaction-related expenses comprised the following costs for the three and nine months ended September 30, 2017 and 2016 (in thousands):


	Three Months Ended September 30,				Nine Months Ended September 30,
	2017		2016		2017		2016
Legal, accounting and other costs	$	3,845	$	1,111	$	7,286	$	17,212
Severance and contract termination costs		1,820		—		11,550		1,421
Advisory and financing commitment fees		—		—		—		14,850

	$	5,665	$	1,111	$	18,836	$	33,483

Priory, Serenity Knolls, TrustPoint and Pocono Mountain Acquisitions [Member]

Summary of Acquisitions

The fair values of assets acquired and liabilities assumed, at the corresponding acquisition dates, during the year ended December 31, 2016 in connection with the Priory, Serenity Knolls, TrustPoint and Pocono Mountain acquisitions (collectively the “2016 Acquisitions”) were as follows (in thousands):


	Priory		Other		Total
Cash	$	10,253	$	2,488	$	12,741
Accounts receivable		57,832		4,264		62,096
Prepaid expenses and other current assets		7,921		103		8,024
Property and equipment		1,598,156		35,400		1,633,556
Goodwill		679,265		96,052		775,317
Intangible assets		23,200		338		23,538
Other assets		8,862		47		8,909

Total assets acquired		2,385,489		138,692		2,524,181
Accounts payable		24,203		749		24,952
Accrued salaries and benefits		39,588		918		40,506
Other accrued expenses		48,305		391		48,696
Deferred tax liabilities – noncurrent		56,462		269		56,731
Long-term debt		1,348,389		—		1,348,389
Other liabilities		61,311		30,243		91,554

Total liabilities assumed		1,578,258		32,570		1,610,828

Net assets acquired	$	807,231	$	106,122	$	913,353

Other Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Other Identifiable Intangible Assets and Related Accumulated Amortization

Other identifiable intangible assets and related accumulated amortization consisted of the following as of September 30, 2017 and December 31, 2016 (in thousands):


	Gross Carrying Amount				Accumulated Amortization
	September 30, 2017		December 31, 2016		September 30, 2017			December 31, 2016
Intangible assets subject to amortization:
Contract intangible assets	$	2,100	$	2,100	$	(2,100	)	$	(2,100	)
Non-compete agreements		1,147		1,147		(1,147	)		(1,147	)

		3,247		3,247		(3,247	)		(3,247	)
Intangible assets not subject to amortization:
Licenses and accreditations		12,263		12,228		—			—
Trade names		60,427		57,538		—			—
Certificates of need		14,261		13,544		—			—

		86,951		83,310		—			—

Total	$	90,198	$	86,557	$	(3,247	)	$	(3,247	)

Property and Equipment (Tables)

9 Months Ended

Sep. 30, 2017

Property, Plant and Equipment [Abstract]

Summary of Property and Equipment

Property and equipment consists of the following as of September 30, 2017 and December 31, 2016 (in thousands):


	September 30, 2017			December 31, 2016
Land	$	445,598		$	411,331
Building and improvements		2,273,128			2,031,819
Equipment		377,857			318,020
Construction in progress		181,029			157,114

		3,277,612			2,918,284
Less accumulated depreciation		(311,397	)		(214,589	)

Property and equipment, net	$	2,966,215		$	2,703,695

Long-Term Debt (Tables)

9 Months Ended

Sep. 30, 2017

Debt Disclosure [Abstract]

Components of Long-Term Debt

Long-term debt consisted of the following (in thousands):


	September 30, 2017			December 31, 2016
Amended and Restated Senior Credit Facility:
Senior Secured Term A Loans	$	385,000		$	400,000
Senior Secured Term B Loans		1,424,538			1,435,450
Senior Secured Revolving Line of Credit		—			—
6.125% Senior Notes due 2021		150,000			150,000
5.125% Senior Notes due 2022		300,000			300,000
5.625% Senior Notes due 2023		650,000			650,000
6.500% Senior Notes due 2024		390,000			390,000
9.0% and 9.5% Revenue Bonds		22,175			22,175
Less: unamortized debt issuance costs, discount and premium		(52,762	)		(59,816	)

		3,268,951			3,287,809
Less: current portion		(34,805	)		(34,805	)

Long-term debt	$	3,234,146		$	3,253,004

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21475-112644

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(e),(f))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21538-112644

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21506-112644

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28541-108399

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21521-112644

+ Details

Equity-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2017

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Stock Option Activity

Stock option activity during 2016 and 2017 was as follows (aggregate intrinsic value in thousands):


	Number of Options			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value
Options outstanding at January 1, 2016		694,743		$	42.87		7.70	$	20,717
Options granted		503,850			57.98		9.28		297
Options exercised		(57,397	)		31.92		N/A		1,530
Options cancelled		(140,250	)		57.13		N/A		N/A

Options outstanding at December 31, 2016		1,000,946			49.42		7.80		8,166
Options granted		236,600			43.11		9.49		382
Options exercised		(81,992	)		26.48		N/A		1,528
Options cancelled		(173,988	)		54.73		N/A		N/A

Options outstanding at September 30, 2017		981,566		$	47.47		7.63	$	4,648

Options exercisable at December 31, 2016		288,959		$	42.81		6.22	$	6,111

Options exercisable at September 30, 2017		407,571		$	41.02		6.20	$	4,172

Restricted Stock Activity

Restricted stock activity during 2016 and 2017 was as follows:


	Number of Shares			Weighted Average Grant-Date Fair Value
Unvested at January 1, 2016		944,562		$	52.74
Granted		387,347			55.38
Cancelled		(122,178	)		57.02
Vested		(365,312	)		47.18

Unvested at December 31, 2016		844,419		$	55.76
Granted		371,924			43.22
Cancelled		(124,743	)		55.42
Vested		(275,294	)		53.78

Unvested at September 30, 2017		816,306		$	50.77

Restricted Stock Unit Activity

Restricted stock unit activity during 2016 and 2017 was as follows:


	Number of Units			Weighted Average Grant-Date Fair Value
Unvested at January 1, 2016		218,084		$	56.97
Granted		230,750			56.95
Cancelled		—			—
Vested		(175,235	)		52.71

Unvested at December 31, 2016		273,599		$	59.68
Granted		219,840			43.23
Cancelled		—			—
Vested		(132,530	)		58.67

Unvested at September 30, 2017		360,909		$	50.04

Schedule of Stock Options Valuation Assumptions

The following table summarizes the grant-date fair value of options and the assumptions used to develop the fair value estimates for options granted during the nine months ended September 30, 2017 and year ended December 31, 2016:


	September 30, 2017			December 31, 2016
Weighted average grant-date fair value of options	$	14.67		$	18.96
Risk-free interest rate		2.0	%		1.4	%
Expected volatility		33	%		33	%
Expected life (in years)		5.5			5.5

Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2017

Fair Value Disclosures [Abstract]

Carrying Amounts and Fair Values of Company's Amended and Restated Senior Credit Facilities and Contingent Consideration Liabilities

The carrying amounts and fair values of the Company’s Amended and Restated Senior Credit Facility, 6.125% Senior Notes, 5.125% Senior Notes, 5.625% Senior Notes, 6.500% Senior Notes, 9.0% and 9.5% Revenue Bonds, derivative instruments and contingent consideration liabilities as of September 30, 2017 and December 31, 2016 were as follows (in thousands):


	Carrying Amount				Fair Value
	September 30, 2017		December 31, 2016		September 30, 2017		December 31, 2016
Amended and Restated Senior Credit Facility	$	1,778,798	$	1,799,993	$	1,778,798	$	1,799,993
6.125% Senior Notes due 2021	$	147,964	$	147,574	$	152,359	$	152,186
5.125% Senior Notes due 2022	$	295,988	$	295,442	$	306,466	$	293,595
5.625% Senior Notes due 2023	$	641,554	$	640,574	$	673,632	$	640,574
6.500% Senior Notes due 2024	$	381,998	$	381,268	$	410,170	$	389,847
9.0% and 9.5% Revenue Bonds	$	22,648	$	22,959	$	22,648	$	22,959
Derivative instruments	$	26,176	$	73,509	$	26,176	$	73,509
Contingent consideration liabilities	$	—	$	107	$	—	$	107

Other Current Assets (Tables)

9 Months Ended

Sep. 30, 2017

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Other Current Assets

Other current assets consisted of the following (in thousands):


	September 30, 2017		December 31, 2016
Other receivables	$	30,910	$	44,975
Prepaid expenses		28,874		27,455
Workers’ compensation deposits – current portion		10,000		10,000
Income taxes receivable		9,472		11,714
Insurance receivable-current portion		6,472		6,472
Inventory		4,698		4,633
Other		1,981		2,288

Other current assets	$	92,407	$	107,537

Other Accrued Liabilities (Tables)

9 Months Ended

Sep. 30, 2017

Other Liabilities Disclosure [Abstract]

Summary of Other Accrued Liabilities

Other accrued liabilities consisted of the following (in thousands):


	September 30, 2017		December 31, 2016
Accrued expenses	$	39,610	$	37,323
Unearned income		25,062		28,805
Accrued interest		15,058		33,616
Insurance liability – current portion		11,672		11,672
Income taxes payable		7,384		527
Accrued property taxes		5,257		2,732
Other		7,360		8,283

Other accrued liabilities	$	111,403	$	122,958

Segment Information (Tables)

9 Months Ended

Sep. 30, 2017

Summary of Reconciliation of Segment EBITDA to Income before Income Taxes

The following tables set forth the financial information by operating segment, including a reconciliation of Segment EBITDA to income before income taxes (in thousands):


	Three Months Ended September 30,						Nine Months Ended September 30,
	2017			2016			2017			2016
Revenue:
U.S. Facilities	$	453,678		$	431,521		$	1,355,315		$	1,269,994
U.K. Facilities		263,036			303,146			756,489			836,004
Corporate and Other		—			(2	)		—			2,028

	$	716,714		$	734,665		$	2,111,804		$	2,108,026

Segment EBITDA (1):
U.S. Facilities	$	118,744		$	108,810		$	359,250		$	334,230
U.K. Facilities		50,665			67,795			146,941			185,664
Corporate and Other		(17,153	)		(20,767	)		(55,346	)		(60,818	)

	$	152,256		$	155,838		$	450,845		$	459,076


	Three Months Ended September 30,						Nine Months Ended September 30,
	2017			2016			2017			2016
Segment EBITDA (1)	$	152,256		$	155,838		$	450,845		$	459,076
Plus (less):
Equity-based compensation expense		(4,175	)		(7,145	)		(19,007	)		(20,989	)
Debt extinguishment costs		—			(3,411	)		(810	)		(3,411	)
Loss on divestiture		—			(174,739	)		—			(174,739	)
Gain on foreign currency derivatives		—			15			—			523
Transaction-related expenses		(5,665	)		(1,111	)		(18,836	)		(33,483	)
Interest expense, net		(44,515	)		(48,843	)		(130,777	)		(135,315	)
Depreciation and amortization		(36,442	)		(36,418	)		(105,256	)		(101,145	)

Income before income taxes	$	61,459		$	(115,814	)	$	176,159		$	(9,483	)

Summary of Assets by Operating Segment

	September 30, 2017		December 31, 2016
Assets (2):
U.S. Facilities	$	3,521,080	$	3,382,167
U.K. Facilities		2,615,828		2,441,018
Corporate and Other		205,678		201,541

	$	6,342,586	$	6,024,726

(1)

(2)

Goodwill [Member]

Summary of Assets by Operating Segment


	U.S. Facilities		U.K. Facilities			Corporate and Other		Consolidated
Goodwill:
Balance at January 1, 2017	$	2,041,795	$	639,393		$	—	$	2,681,188
Foreign currency translation		—		55,260			—		55,260
Purchase price allocation and other		797		(6,883	)		—		(6,086	)

Balance at September 30, 2017	$	2,042,592	$	687,770		$	—	$	2,730,362

Accumulated Other Comprehensive Loss (Tables)

9 Months Ended

Sep. 30, 2017

Equity [Abstract]

Components Of Accumulated Other Comprehensive Loss

The components of accumulated other comprehensive loss are as follows (in thousands):


	Foreign Currency Translation Adjustments			Change in Fair Value of Derivative Instruments			Pension Plan			Total
Balance at December 31, 2016	$	(584,081	)	$	40,598		$	(6,087	)	$	(549,570	)
Foreign currency translation gain		189,265			—			(521	)		188,744
Loss on derivative instruments, net of tax of $(18.8) million		—			(24,354	)		—			(24,354	)

Balance at September 30, 2017	$	(394,816	)	$	16,244		$	(6,608	)	$	(385,180	)

Financial Information for the Company and Its Subsidiaries (Tables)

9 Months Ended

Sep. 30, 2017

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Summary of Condensed Consolidating Balance Sheets

Acadia Healthcare Company, Inc.

Condensed Consolidating Balance Sheets

September 30, 2017

(In thousands)


	Parent		Combined Subsidiary Guarantors		Combined Non- Guarantors		Consolidating Adjustments			Total Consolidated Amounts
Current assets:
Cash and cash equivalents	$	—	$	43,714	$	31,947	$	—		$	75,661
Accounts receivable, net		—		230,283		65,473		—			295,756
Other current assets		—		68,978		23,429		—			92,407

Total current assets		—		342,975		120,849		—			463,824
Property and equipment, net		—		1,042,800		1,923,415		—			2,966,215
Goodwill		—		1,936,057		794,305		—			2,730,362
Intangible assets, net		—		57,392		29,559		—			86,951
Deferred tax assets – noncurrent		3,378		—		4,399		(4,088	)		3,689
Derivative instruments		26,176		—		—		—			26,176
Investment in subsidiaries		5,228,165		—		—		(5,228,165	)		—
Other assets		490,535		53,903		8,375		(487,444	)		65,369

Total assets	$	5,748,254	$	3,433,127	$	2,880,902	$	(5,719,697	)	$	6,342,586

Current liabilities:
Current portion of long-term debt	$	34,550	$	—	$	255	$	—		$	34,805
Accounts payable		—		62,655		32,450		—			95,105
Accrued salaries and benefits		—		68,271		31,622		—			99,893
Other accrued liabilities		14,365		12,392		84,646		—			111,403

Total current liabilities		48,915		143,318		148,973		—			341,206
Long-term debt		3,211,754		—		509,836		(487,444	)		3,234,146
Deferred tax liabilities – noncurrent		—		36,341		49,419		(4,088	)		81,672
Other liabilities		—		112,094		67,235		—			179,329

Total liabilities		3,260,669		291,753		775,463		(491,532	)		3,836,353

Redeemable noncontrolling interests		—		—		18,648		—			18,648

Total equity		2,487,585		3,141,374		2,086,791		(5,228,165	)		2,487,585

Total liabilities and equity	$	5,748,254	$	3,433,127	$	2,880,902	$	(5,719,697	)	$	6,342,586

Acadia Healthcare Company, Inc.

Condensed Consolidating Balance Sheets

December 31, 2016

(In thousands)


	Parent		Combined Subsidiary Guarantors		Combined Non- Guarantors		Consolidating Adjustments			Total Consolidated Amounts
Current assets:
Cash and cash equivalents	$	—	$	15,681	$	41,382	$	—		$	57,063
Accounts receivable, net		—		209,124		54,203		—			263,327
Other current assets		—		61,724		45,813		—			107,537

Total current assets		—		286,529		141,398		—			427,927
Property and equipment, net		—		940,880		1,762,815		—			2,703,695
Goodwill		—		1,935,260		745,928		—			2,681,188
Intangible assets, net		—		56,676		26,634		—			83,310
Deferred tax assets – noncurrent		13,522		—		4,606		(14,348	)		3,780
Derivative instruments		73,509		—		—		—			73,509
Investment in subsidiaries		4,885,865		—		—		(4,885,865	)		—
Other assets		493,294		40,480		7,189		(489,646	)		51,317

Total assets	$	5,466,190	$	3,259,825	$	2,688,570	$	(5,389,859	)	$	6,024,726

Current liabilities:
Current portion of long-term debt	$	34,550	$	—	$	255	$	—		$	34,805
Accounts payable		—		49,205		30,829		—			80,034
Accrued salaries and benefits		—		72,835		32,233		—			105,068
Other accrued liabilities		33,616		24,375		64,967		—			122,958

Total current liabilities		68,166		146,415		128,284		—			342,865
Long-term debt		3,230,300		—		512,350		(489,646	)		3,253,004
Deferred tax liabilities – noncurrent		—		40,574		52,294		(14,348	)		78,520
Other liabilities		—		101,938		62,921		—			164,859

Total liabilities		3,298,466		288,927		755,849		(503,994	)		3,839,248

Redeemable noncontrolling interests		—		—		17,754		—			17,754

Total equity		2,167,724		2,970,898		1,914,967		(4,885,865	)		2,167,724

Total liabilities and equity	$	5,466,190	$	3,259,825	$	2,688,570	$	(5,389,859	)	$	6,024,726

Summary of Condensed Consolidating Statement of Comprehensive Income (Loss)

Acadia Healthcare Company, Inc.

Condensed Consolidating Statement of Comprehensive Income (Loss)

Three Months Ended September 30, 2017

(In thousands)


	Parent			Combined Subsidiary Guarantors			Combined Non- Guarantors			Consolidating Adjustments			Total Consolidated Amounts
Revenue before provision for doubtful accounts	$	—		$	440,423		$	288,289		$	—		$	728,712
Provision for doubtful accounts		—			(10,310	)		(1,688	)		—			(11,998	)

Revenue		—			430,113			286,601			—			716,714
Salaries, wages and benefits		4,175			225,001			156,386			—			385,562
Professional fees		—			24,385			28,657			—			53,042
Supplies		—			18,843			9,809			—			28,652
Rents and leases		—			8,127			10,922			—			19,049
Other operating expenses		—			55,077			27,251			—			82,328
Depreciation and amortization		—			16,963			19,479			—			36,442
Interest expense, net		15,933			19,304			9,278			—			44,515
Transaction-related expenses		—			2,211			3,454			—			5,665

Total expenses		20,108			369,911			265,236			—			655,255
(Loss) income before income taxes		(20,108	)		60,202			21,365			—			61,459
Equity in earnings of subsidiaries		55,925			—			—			(55,925	)		—
(Benefit from) provision for income taxes		(9,672	)		21,202			4,440			—			15,970

Net income (loss)		45,489			39,000			16,925			(55,925	)		45,489
Net loss attributable to noncontrolling interests		—			—			129			—			129

Net income (loss) attributable to Acadia Healthcare Company, Inc.	$	45,489		$	39,000		$	17,054		$	(55,925	)	$	45,618

Other comprehensive income (loss):
Foreign currency translation gain		—			—			69,622			—			69,622
Loss on derivative instruments		(9,402	)		—			—			—			(9,402	)

Other comprehensive (loss) income		(9,402	)		—			69,622			—			60,220

Comprehensive income (loss) attributable to Acadia Healthcare Company, Inc.	$	36,087		$	39,000		$	86,676		$	(55,925	)	$	105,838

Acadia Healthcare Company, Inc.

Condensed Consolidating Statement of Comprehensive Income (Loss)

Three Months Ended September 30, 2016

(In thousands)


	Parent			Combined Subsidiary Guarantors			Combined Non- Guarantors			Consolidating Adjustments		Total Consolidated Amounts
Revenue before provision for doubtful accounts	$	—		$	420,061		$	324,741		$	—	$	744,802
Provision for doubtful accounts		—			(9,383	)		(754	)		—		(10,137	)

Revenue		—			410,678			323,987			—		734,665
Salaries, wages and benefits		7,145			224,692			176,405			—		408,242
Professional fees		—			21,140			26,547			—		47,687
Supplies		—			19,467			11,088			—		30,555
Rents and leases		—			8,759			10,981			—		19,740
Other operating expenses		—			51,536			28,212			—		79,748
Depreciation and amortization		—			15,105			21,313			—		36,418
Interest expense, net		13,388			19,258			16,197			—		48,843
Debt extinguishment costs		3,411			—			—			—		3,411
Loss on divestiture		—			—			174,739			—		174,739
Gain on foreign currency derivatives		(15	)		—			—			—		(15	)
Transaction-related expenses		—			—			1,111			—		1,111

Total expenses		23,929			359,957			466,593			—		850,479
(Loss) income before income taxes		(23,929	)		50,721			(142,606	)		—		(115,814	)
Equity in earnings of subsidiaries		(99,875	)		—			—			99,875		—
(Benefit from) provision for income taxes		(5,594	)		38,654			(30,664	)		—		2,396

Net (loss) income		(118,210	)		12,067			(111,942	)		99,875		(118,210	)
Net loss attributable to noncontrolling interests		—			—			402			—		402

Net (loss) income attributable to Acadia Healthcare Company, Inc.	$	(118,210	)	$	12,067		$	(111,540	)	$	99,875	$	(117,808	)

Other comprehensive loss:
Foreign currency translation loss		—			—			(89,645	)		—		(89,645	)
Gain on derivative instruments		6,387			—			—			—		6,387

Other comprehensive income (loss)		6,387			—			(89,645	)		—		(83,258	)

Comprehensive (loss) income attributable to Acadia Healthcare Company, Inc.	$	(111,823	)	$	12,067		$	(201,185	)	$	99,875	$	(201,066	)

Acadia Healthcare Company, Inc.

Condensed Consolidating Statement of Comprehensive Income (Loss)

Nine Months Ended September 30, 2017

(In thousands)


	Parent			Combined Subsidiary Guarantors			Combined Non- Guarantors			Consolidating Adjustments			Total Consolidated Amounts
Revenue before provision for doubtful accounts	$	—		$	1,311,937		$	831,759		$	—		$	2,143,696
Provision for doubtful accounts		—			(28,007	)		(3,885	)		—			(31,892	)

Revenue		—			1,283,930			827,874			—			2,111,804
Salaries, wages and benefits		19,007			675,206			451,365			—			1,145,578
Professional fees		—			69,796			72,976			—			142,772
Supplies		—			56,502			28,498			—			85,000
Rents and leases		—			25,139			32,316			—			57,455
Other operating expenses		—			164,596			84,565			—			249,161
Depreciation and amortization		—			48,918			56,338			—			105,256
Interest expense, net		46,392			57,054			27,331			—			130,777
Debt extinguishment costs		810			—			—			—			810
Transaction-related expenses		—			6,219			12,617			—			18,836

Total expenses		66,209			1,103,430			766,006			—			1,935,645
(Loss) income before income taxes		(66,209	)		180,500			61,868			—			176,159
Equity in earnings of subsidiaries		163,931			—			—			(163,931	)		—
(Benefit from) provision for income taxes		(32,178	)		66,124			12,313			—			46,259

Net income (loss)		129,900			114,376			49,555			(163,931	)		129,900
Net loss attributable to noncontrolling interests		—			—			306			—			306

Net income (loss) attributable to Acadia Healthcare Company, Inc.	$	129,900		$	114,376		$	49,861		$	(163,931	)	$	130,206

Other comprehensive income (loss):
Foreign currency translation gain		—			—			188,744			—			188,744
Loss on derivative instruments		(24,354	)		—			—			—			(24,354	)

Other comprehensive (loss) income		(24,354	)		—			188,744			—			164,390

Comprehensive income (loss) attributable to Acadia Healthcare Company, Inc.	$	105,546		$	114,376		$	238,605		$	(163,931	)	$	294,596

Acadia Healthcare Company, Inc.

Condensed Consolidating Statement of Comprehensive Income (Loss)

Nine Months Ended September 30, 2016

(In thousands)


	Parent			Combined Subsidiary Guarantors			Combined Non- Guarantors			Consolidating Adjustments			Total Consolidated Amounts
Revenue before provision for doubtful accounts	$	—		$	1,245,227		$	893,812		$	—		$	2,139,039
Provision for doubtful accounts		—			(28,318	)		(2,695	)		—			(31,013	)

Revenue		—			1,216,909			891,117			—			2,108,026
Salaries, wages and benefits		20,989			648,669			487,899			—			1,157,557
Professional fees		—			66,967			71,003			—			137,970
Supplies		—			57,456			30,993			—			88,449
Rents and leases		—			25,857			29,156			—			55,013
Other operating expenses		—			151,485			79,465			—			230,950
Depreciation and amortization		—			42,072			59,073			—			101,145
Interest expense, net		37,452			57,394			40,469			—			135,315
Debt extinguishment costs		3,411			—			—			—			3,411
Loss on divestiture		—			—			174,739			—			174,739
Gain on foreign currency derivatives		(523	)		—			—			—			(523	)
Transaction-related expenses		—			25,624			7,859			—			33,483

Total expenses		61,329			1,075,524			980,656			—			2,117,509
(Loss) income before income taxes		(61,329	)		141,385			(89,539	)		—			(9,483	)
Equity in earnings of subsidiaries		8,937			—			—			(8,937	)		—
(Benefit from) provision for income taxes		(15,142	)		62,247			(19,338	)		—			27,767

Net (loss) income		(37,250	)		79,138			(70,201	)		(8,937	)		(37,250	)
Net loss attributable to noncontrolling interests		—			—			1,575			—			1,575

Net (loss) income attributable to Acadia Healthcare Company, Inc.	$	(37,250	)	$	79,138		$	(68,626	)	$	(8,937	)	$	(35,675	)

Other comprehensive loss:
Foreign currency translation loss		—			—			(351,528	)		—			(351,528	)
Gain on derivative instruments		30,306			—			—			—			30,306

Other comprehensive income (loss)		30,306			—			(351,528	)		—			(321,222	)

Comprehensive (loss) income attributable to Acadia Healthcare Company, Inc.	$	(6,944	)	$	79,138		$	(420,154	)	$	(8,937	)	$	(356,897	)

Summary of Condensed Consolidating Statement of Cash Flows

Acadia Healthcare Company, Inc.

Condensed Consolidating Statement of Cash Flows

Nine Months Ended September 30, 2017

(In thousands)


	Parent			Combined Subsidiary Guarantors			Combined Non- Guarantors			Consolidating Adjustments			Total Consolidated Amounts
Operating activities:
Net income (loss)	$	129,900		$	114,376		$	49,555		$	(163,931	)	$	129,900
Adjustments to reconcile net income (loss) to net cash (used in) provided by continuing operating activities:
Equity in earnings of subsidiaries		(163,931	)		—			—			163,931			—
Depreciation and amortization		—			48,918			56,338			—			105,256
Amortization of debt issuance costs		7,652			—			(312	)		—			7,340
Equity-based compensation expense		19,007			—			—			—			19,007
Deferred income tax expense		156			22,401			6,859			—			29,416
Debt extinguishment costs		810			—			—			—			810
Other		4,216			1,727			4,729			—			10,672
Change in operating assets and liabilities, net of effect of acquisitions:
Accounts receivable, net		—			(21,183	)		(7,498	)		—			(28,681	)
Other current assets		—			1,126			24,973			—			26,099
Other assets		3,479			(705	)		139			(3,479	)		(566	)
Accounts payable and other accrued liabilities		—			(22,372	)		(4,009	)		—			(26,381	)
Accrued salaries and benefits		—			(4,759	)		(3,178	)		—			(7,937	)
Other liabilities		—			4,084			3,593			—			7,677

Net cash provided by (used in) continuing operating activities		1,289			143,613			131,189			(3,479	)		272,612
Net cash used in discontinued operating activities		—			(1,261	)		—			—			(1,261	)

Net cash provided by (used in) operating activities		1,289			142,352			131,189			(3,479	)		271,351
Investing activities:
Cash paid for capital expenditures		—			(114,130	)		(79,687	)		—			(193,817	)
Cash paid for real estate acquisitions		—			(33,297	)		—			—			(33,297	)
Other		—			(7,984	)		1,922			—			(6,062	)

Net cash used in investing activities		—			(155,411	)		(77,765	)		—			(233,176	)
Financing activities:
Principal payments on long-term debt		(25,913	)		—			(3,479	)		3,479			(25,913	)
Common stock withheld for minimum statutory taxes, net		(3,278	)		—			—			—			(3,278	)
Other		—			1,649			—			—			1,649
Cash provided by (used in) intercompany activity		27,902			39,443			(67,345	)		—			—

Net cash (used in) provided by financing activities		(1,289	)		41,092			(70,824	)		3,479			(27,542	)

Effect of exchange rate changes on cash		—			—			7,965			—			7,965

Net increase in cash and cash equivalents		—			28,033			(9,435	)		—			18,598
Cash and cash equivalents at beginning of the period		—			15,681			41,382			—			57,063

Cash and cash equivalents at end of the period	$	—		$	43,714		$	31,947		$	—		$	75,661

Acadia Healthcare Company, Inc.

Condensed Consolidating Statement of Cash Flows

Nine Months Ended September 30, 2016

(In thousands)


	Parent			Combined Subsidiary Guarantors			Combined Non- Guarantors			Consolidating Adjustments			Total Consolidated Amounts
Operating activities:
Net (loss) income	$	(37,250	)	$	79,138		$	(70,201	)	$	(8,937	)	$	(37,250	)
Adjustments to reconcile net income (loss) to net cash (used in) provided by continuing operating activities:
Equity in earnings of subsidiaries		(8,937	)		—			—			8,937			—
Depreciation and amortization		—			42,072			59,073			—			101,145
Amortization of debt issuance costs		8,035			—			(321	)		—			7,714
Equity-based compensation expense		20,989			—			—			—			20,989
Deferred income tax (benefit) expense		—			26,381			(524	)		—			25,857
Debt extinguishment costs		3,411			—			—			—			3,411
Loss on divestiture		—			—			174,739			—			174,739
Gain on foreign currency derivatives		(523	)		—			—			—			(523	)
Other		—			826			(95	)		—			731
Change in operating assets and liabilities, net of effect of acquisitions:
Accounts receivable, net		—			(26,055	)		13,476			—			(12,579	)
Other current assets		—			(4,901	)		(8,072	)		—			(12,973	)
Other assets		(2,780	)		(818	)		(316	)		2,780			(1,134	)
Accounts payable and other accrued liabilities		—			31,633			(29,566	)		—			2,067
Accrued salaries and benefits		—			3,527			(14,286	)		—			(10,759	)
Other liabilities		—			5,975			(2,229	)		—			3,746

Net cash (used in) provided by continuing operating activities		(17,055	)		157,778			121,678			2,780			265,181
Net cash used in discontinued operating activities		—			(5,524	)		—			—			(5,524	)

Net cash (used in) provided by operating activities		(17,055	)		152,254			121,678			2,780			259,657
Investing activities:
Cash paid for acquisitions, net of cash acquired		—			(103,189	)		(580,096	)		—			(683,285	)
Cash paid for capital expenditures		—			(142,626	)		(107,335	)		—			(249,961	)
Cash paid for real estate acquisitions		—			(26,146	)		(11,801	)		—			(37,947	)
Settlement of foreign currency derivatives		—			523			—			—			523
Other		—			(1,135	)		—			—			(1,135	)

Net cash used in investing activities		—			(272,573	)		(699,232	)		—			(971,805	)
Financing activities:
Borrowings on long-term debt		1,480,000			—			—			—			1,480,000
Borrowings on revolving credit facility		179,000			—			—			—			179,000
Principal payments on revolving credit facility		(166,000	)		—			—			—			(166,000	)
Principal payments on long-term debt		(46,069	)		—			(2,780	)		2,780			(46,069	)
Repayment of assumed debt		(1,348,389	)		—			—			—			(1,348,389	)
Payment of debt issuance costs		(35,748	)		—			—			—			(35,748	)
Issuance of common stock		685,097			—			—			—			685,097
Common stock withheld for minimum statutory taxes, net		(7,917	)		—			—			—			(7,917	)
Other		—			(1,821	)		—			—			(1,821	)
Cash (used in) provided by intercompany activity		(722,919	)		125,313			603,166			(5,560	)		—

Net cash provided by (used in) financing activities		17,055			123,492			600,386			(2,780	)		738,153

Effect of exchange rate changes on cash		—			—			(9,469	)		—			(9,469	)

Net increase in cash and cash equivalents		—			3,173			13,363			—			16,536
Cash and cash equivalents at beginning of the period		—			1,987			9,228			—			11,215

Cash and cash equivalents at end of the period	$	—		$	5,160		$	22,591		$	—		$	27,751

Description of Business and Basis of Presentation - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2017 Beds State Facilities
Accounting Policies [Abstract]
Number of facilities \| Facilities	579
Number of beds \| Beds	17,400
Number of operating states \| State	39

Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Numerator:
Net income (loss) attributable to Acadia Healthcare Company, Inc.	$ 45,618	$ (117,808)	$ 130,206	$ (35,675)
Denominator:
Weighted average shares outstanding for basic earnings per share	87,017	86,618	86,912	85,376
Effect of dilutive instruments	155		126
Shares used in computing diluted earnings per common share	87,172	86,618	87,038	85,376
Earnings per share attributable to Acadia Healthcare Company, Inc. stockholders:
Basic	$ 0.52	$ (1.36)	$ 1.50	$ (0.42)
Diluted	$ 0.52	$ (1.36)	$ 1.50	$ (0.42)

Earnings Per Share - Additional Information (Detail) - shares shares in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Earnings Per Share [Abstract]
Excluded common stock for computation of diluted earnings per share	1.0	0.2	1.5	0.3

Acquisitions - 2016 US Acquisitions - Additional Information (Detail) $ in Millions	Jun. 01, 2016 USD ($) Beds	May 01, 2016 USD ($) Beds	Apr. 01, 2016 USD ($) Beds
Pocono Mountain Recovery Center [Member]
Business Acquisition [Line Items]
Number of beds \| Beds	108
Business acquisition cash consideration \| $	$ 25.4
Serenity Knolls Inc [Member]
Business Acquisition [Line Items]
Number of beds \| Beds			30
Business acquisition cash paid \| $			$ 10.0
Tennessee [Member] \| TrustPoint Hospital [Member]
Business Acquisition [Line Items]
Number of beds \| Beds		100
Business acquisition cash paid \| $		$ 62.7

Acquisitions - Priory Acquisition - Additional Information (Detail) $ in Thousands, £ in Millions				3 Months Ended	9 Months Ended
	Nov. 30, 2016 GBP (£)	Oct. 18, 2016 Bed Facility	Feb. 16, 2016 USD ($) Bed Facility shares	Sep. 30, 2016 USD ($)	Sep. 30, 2016 USD ($)
Business Acquisition [Line Items]
Number of beds to be sold \| Bed		1,000
Cash received from sale of business \| £	£ 320
Loss on divestiture				$ (174,739)	$ (174,739)
U.K. Behavioral Health Facilities [Member]
Business Acquisition [Line Items]
Number of facilities to be sold \| Facility		21
De novo Behavioral Health Facility [Member]
Business Acquisition [Line Items]
Number of facilities to be sold \| Facility		1
U.K. Disposal Group [Member]
Business Acquisition [Line Items]
Loss on divestiture				$ 174,700	174,700
U.K. Disposal Group [Member] \| Allocation of Goodwill [Member]
Business Acquisition [Line Items]
Loss on divestiture					106,900
U.K. Disposal Group [Member] \| Estimated Transaction Related Expense [Member]
Business Acquisition [Line Items]
Loss on divestiture					25,600
U.K. Disposal Group [Member] \| Loss on Sale of Properties [Member]
Business Acquisition [Line Items]
Loss on divestiture					$ 42,200
Priory [Member]
Business Acquisition [Line Items]
Total consideration related to acquisition			$ 2,200,000
Business acquisition cash paid			$ 1,900,000
Shares issued for acquisition \| shares			4,033,561
Number of facilities acquired \| Facility			324
Number of beds \| Bed			7,100

Acquisitions - Summary of Acquisitions - Additional Information (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016
Business Acquisition [Line Items]
Goodwill associated with domestic acquisitions	$ 2,730,362	$ 2,681,188
Domestic Acquisitions in 2016 [Member]
Business Acquisition [Line Items]
Goodwill associated with domestic acquisitions			$ 31,500

Acquisitions - Summary of Acquisitions (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Goodwill	$ 2,730,362	$ 2,681,188
2016 Acquisitions [Member]
Business Acquisition [Line Items]
Cash		12,741
Accounts receivable		62,096
Prepaid expenses and other current assets		8,024
Property and equipment		1,633,556
Goodwill		775,317
Intangible assets		23,538
Other assets		8,909
Total assets acquired		2,524,181
Accounts payable		24,952
Accrued salaries and benefits		40,506
Other accrued expenses		48,696
Deferred tax liabilities - noncurrent		56,731
Long-term debt		1,348,389
Other liabilities		91,554
Total liabilities assumed		1,610,828
Net assets acquired		913,353
Other [Member] \| 2016 Acquisitions [Member]
Business Acquisition [Line Items]
Cash		2,488
Accounts receivable		4,264
Prepaid expenses and other current assets		103
Property and equipment		35,400
Goodwill		96,052
Intangible assets		338
Other assets		47
Total assets acquired		138,692
Accounts payable		749
Accrued salaries and benefits		918
Other accrued expenses		391
Deferred tax liabilities - noncurrent		269
Other liabilities		30,243
Total liabilities assumed		32,570
Net assets acquired		106,122
Priory [Member] \| 2016 Acquisitions [Member]
Business Acquisition [Line Items]
Cash		10,253
Accounts receivable		57,832
Prepaid expenses and other current assets		7,921
Property and equipment		1,598,156
Goodwill		679,265
Intangible assets		23,200
Other assets		8,862
Total assets acquired		2,385,489
Accounts payable		24,203
Accrued salaries and benefits		39,588
Other accrued expenses		48,305
Deferred tax liabilities - noncurrent		56,462
Long-term debt		1,348,389
Other liabilities		61,311
Total liabilities assumed		1,578,258
Net assets acquired		$ 807,231

Acquisitions - Transaction Related Expenses as Incurred (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Business Combinations [Abstract]
Legal, accounting and other costs	$ 3,845	$ 1,111	$ 7,286	$ 17,212
Severance and contract termination costs	1,820		11,550	1,421
Advisory and financing commitment fees				14,850
Transaction-related expenses	$ 5,665	$ 1,111	$ 18,836	$ 33,483

Other Intangible Assets - Other Identifiable Intangible Assets and Related Accumulated Amortization (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Schedule Of Finite and Indefinite Lived Other Intangible Assets [Line Items]
Intangible assets subject to amortization, Gross Carrying Amount	$ 3,247	$ 3,247
Intangible assets not subject to amortization, Gross Carrying Amount	86,951	83,310
Total	90,198	86,557
Intangible assets subject to amortization, Accumulated Amortization	(3,247)	(3,247)
Intangible assets not subject to amortization, Accumulated Amortization	0	0
Total	(3,247)	(3,247)
Contract Intangible Assets [Member]
Schedule Of Finite and Indefinite Lived Other Intangible Assets [Line Items]
Intangible assets subject to amortization, Gross Carrying Amount	2,100	2,100
Intangible assets subject to amortization, Accumulated Amortization	(2,100)	(2,100)
Non-Compete Agreements [Member]
Schedule Of Finite and Indefinite Lived Other Intangible Assets [Line Items]
Intangible assets subject to amortization, Gross Carrying Amount	1,147	1,147
Intangible assets subject to amortization, Accumulated Amortization	(1,147)	(1,147)
Licenses and Accreditations [Member]
Schedule Of Finite and Indefinite Lived Other Intangible Assets [Line Items]
Intangible assets not subject to amortization, Gross Carrying Amount	12,263	12,228
Intangible assets not subject to amortization, Accumulated Amortization	0	0
Trade Names [Member]
Schedule Of Finite and Indefinite Lived Other Intangible Assets [Line Items]
Intangible assets not subject to amortization, Gross Carrying Amount	60,427	57,538
Intangible assets not subject to amortization, Accumulated Amortization	0	0
Certificates of Need [Member]
Schedule Of Finite and Indefinite Lived Other Intangible Assets [Line Items]
Intangible assets not subject to amortization, Gross Carrying Amount	14,261	13,544
Intangible assets not subject to amortization, Accumulated Amortization	$ 0	$ 0

Other Intangible Assets - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense	$ 0.1	$ 0.3

Property and Equipment - Summary of Property and Equipment (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 3,277,612	$ 2,918,284
Less accumulated depreciation	(311,397)	(214,589)
Property and equipment, net	2,966,215	2,703,695
Land [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	445,598	411,331
Building and Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	2,273,128	2,031,819
Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	377,857	318,020
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 181,029	$ 157,114

Long-Term Debt - Components of Long-Term Debt (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016	Sep. 21, 2015
Debt Instrument [Line Items]
Less: unamortized debt issuance costs, discount and premium	$ (52,762)	$ (59,816)
Long-term debt	3,268,951	3,287,809
Long-term debt	3,268,951	3,287,809
Less: current portion	(34,805)	(34,805)
Long-term debt	3,234,146	3,253,004
6.125% Senior Notes Due 2021 [Member]
Debt Instrument [Line Items]
Senior Notes	150,000	150,000
5.125% Senior Notes Due 2022 [Member]
Debt Instrument [Line Items]
Senior Notes	300,000	300,000
5.625% Senior Notes Due 2023 [Member]
Debt Instrument [Line Items]
Senior Notes	650,000	650,000	$ 650,000
6.500% Senior Notes Due 2024 [Member]
Debt Instrument [Line Items]
Senior Notes	390,000	390,000
Amended and Restated Senior Credit Facility [Member] \| Senior Secured Term A Loans [Member]
Debt Instrument [Line Items]
Senior Secured	385,000	400,000
Amended and Restated Senior Credit Facility [Member] \| Senior Secured Term B Loans [Member]
Debt Instrument [Line Items]
Senior Secured	1,424,538	1,435,450
9.0% and 9.5% Revenue Bonds [Member]
Debt Instrument [Line Items]
9.0% and 9.5% Revenue Bonds	$ 22,175	$ 22,175

Long-Term Debt - Components of Long-Term Debt (Parenthetical) (Detail)	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016	Feb. 16, 2016	Sep. 21, 2015	Feb. 11, 2015	Jul. 01, 2014	Mar. 12, 2013
6.125% Senior Notes Due 2021 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	6.125%	6.125%					6.125%
Senior notes maturity year	2021	2021
5.125% Senior Notes Due 2022 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	5.125%	5.125%				5.125%
Senior notes maturity year	2022	2022
5.625% Senior Notes Due 2023 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	5.625%	5.625%		5.625%	5.625%
Senior notes maturity year	2023	2023
6.500% Senior Notes Due 2024 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	6.50%	6.50%	6.50%
Senior notes maturity year	2024	2024
9.0% Revenue Bonds [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	9.00%	9.00%
9.5% Revenue Bonds [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	9.50%	9.50%

Long-Term Debt (Amended and Restated Senior Credit Facility) - Additional Information (Detail) - USD ($)												3 Months Ended				9 Months Ended
	May 10, 2017	May 09, 2017	Nov. 30, 2016	Sep. 21, 2016	Sep. 20, 2016	May 26, 2016	May 25, 2016	Feb. 16, 2016	Dec. 15, 2015	Dec. 31, 2012	Apr. 01, 2011	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Sep. 30, 2017	Sep. 30, 2016	Nov. 22, 2016	Dec. 15, 2014
Debt Instrument [Line Items]
Debt extinguishment costs													$ (3,411,000)			$ (810,000)	$ (3,411,000)
Line of Credit Facility, Expiration Date			Feb. 13, 2019
Consolidated funded debt, unrestricted and unencumbered cash to consolidated EBITDA																			$ 40,000,000
Senior Secured Revolving Line of Credit [Member]
Debt Instrument [Line Items]
Line of credit			$ 300,000,000
Term Loan A- Facility [Member]
Debt Instrument [Line Items]
Line of credit			600,600,000
Eurodollar [Member]
Debt Instrument [Line Items]
Interest on borrowings																2.75%
Base Rate Loans [Member]
Debt Instrument [Line Items]
Interest on borrowings																1.75%
Amended and Restated Senior Credit Facility [Member]
Debt Instrument [Line Items]
Date entered into an agreement										Dec. 31, 2012	Apr. 01, 2011
Additional term loans								$ 135,000,000
Debt extinguishment costs			$ 800,000
Line of Credit Facility, Expiration Date			Nov. 30, 2021
Debt Instrument, Interest Rate, Decrease			0.50%
Amount available under revolving line of credit																$ 493,500,000
Debt instrument maturity date									Nov. 30, 2021							Feb. 11, 2022
Term loan repayments															$ 1,300,000
Amended and Restated Senior Credit Facility [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Fair market value of real property																		$ 5,000,000
Amended and Restated Senior Credit Facility [Member] \| Tranche B-1 Repricing Amendment [Member]
Debt Instrument [Line Items]
Date entered into an agreement																May 26, 2016
New incremental Term Loan B facility						$ 500,000,000
Amended and Restated Senior Credit Facility [Member] \| Tranche B-2 Repricing Amendment [Member]
Debt Instrument [Line Items]
Debt extinguishment costs																$ 3,400,000
Amended and Restated Senior Credit Facility [Member] \| Third Repricing Amendment [Member]
Debt Instrument [Line Items]
Debt extinguishment costs	$ 800,000
Amended and Restated Senior Credit Facility [Member] \| Ninth Amendment [Member]
Debt Instrument [Line Items]
Date entered into an agreement																Jan. 25, 2016
Restrictive covenants on investments, Description																The Ninth Amendment modifies certain definitions and provides increased flexibility to the Company in terms of its financial covenants. The Company’s baskets for permitted investments were also increased to provide increased flexibility for it to invest in non-wholly owned subsidiaries, joint ventures and foreign subsidiaries. The Company may now invest in non-wholly owned subsidiaries and joint ventures up to 10.0% of the Company and its subsidiaries’ total assets in any four consecutive fiscal quarter period, and up to 12.5% of the Company and its subsidiaries’ total assets during the term of the Amended and Restated Credit Agreement. The Company may also invest in foreign subsidiaries that are not loan parties up to 10% of the Company and its subsidiaries’ total assets in any consecutive four fiscal quarter period, and up to 15% of the Company and its subsidiaries’ total assets during the term of the Amended and Restated Credit Agreement. The foregoing permitted investments are subject to an aggregate cap of 25% of the Company and its subsidiaries’ total assets in any fiscal year.
Amended and Restated Senior Credit Facility [Member] \| Second Incremental Amendment [Member]
Debt Instrument [Line Items]
Date entered into an agreement																Feb. 16, 2016
New incremental Term Loan B facility								955,000,000
Amended and Restated Senior Credit Facility [Member] \| Senior Secured Revolving Line of Credit [Member]
Debt Instrument [Line Items]
Line of credit			$ 500,000,000					$ 300,000,000
Amended and Restated Senior Credit Facility [Member] \| TLB Facility Due on February 16, 2023 [Member]
Debt Instrument [Line Items]
Term loan repayments															$ 2,400,000
Amended and Restated Senior Credit Facility [Member] \| Term Loan A- Facility [Member]
Debt Instrument [Line Items]
Line of credit			$ 400,000,000
Amended and Restated Senior Credit Facility [Member] \| Standby Letters of Credit [Member]
Debt Instrument [Line Items]
New incremental Term Loan B facility																$ 6,500,000
Amended and Restated Senior Credit Facility [Member] \| Eurodollar [Member]
Debt Instrument [Line Items]
Basis spread on variable rate																1.00%
Amended and Restated Senior Credit Facility [Member] \| Eurodollar [Member] \| Tranche B-1 Repricing Amendment [Member]
Debt Instrument [Line Items]
Interest on borrowings						3.00%	3.50%
Amended and Restated Senior Credit Facility [Member] \| Eurodollar [Member] \| Tranche B-2 Repricing Amendment [Member]
Debt Instrument [Line Items]
Interest on borrowings				3.00%	3.75%
Amended and Restated Senior Credit Facility [Member] \| Eurodollar [Member] \| Third Repricing Amendment [Member]
Debt Instrument [Line Items]
Interest on borrowings	2.75%	3.00%
Amended and Restated Senior Credit Facility [Member] \| Base Rate Loans [Member]
Debt Instrument [Line Items]
Basis spread on variable rate																0.50%
Amended and Restated Senior Credit Facility [Member] \| Base Rate Loans [Member] \| Tranche B-1 Repricing Amendment [Member]
Debt Instrument [Line Items]
Interest on borrowings						2.00%	2.50%
Amended and Restated Senior Credit Facility [Member] \| Base Rate Loans [Member] \| Tranche B-2 Repricing Amendment [Member]
Debt Instrument [Line Items]
Interest on borrowings				2.00%	2.75%
Amended and Restated Senior Credit Facility [Member] \| Base Rate Loans [Member] \| Third Repricing Amendment [Member]
Debt Instrument [Line Items]
Interest on borrowings	1.75%	2.00%
Amended and Restated Senior Credit Facility [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Interest on borrowings																2.75%
Amended and Restated Senior Credit Facility [Member] \| June 30, 2017 to December 31, 2019 [Member]
Debt Instrument [Line Items]
Term loan principal repayments									$ 5,000,000
Term loan repayments														$ 1,300,000
Amended and Restated Senior Credit Facility [Member] \| June 30, 2017 to December 31, 2019 [Member] \| TLB Facility Due on February 16, 2023 [Member]
Debt Instrument [Line Items]
Term loan repayments														$ 2,400,000
Amended and Restated Senior Credit Facility [Member] \| September 30, 2015 to December 31, 2015 [Member]
Debt Instrument [Line Items]
Term loan repayments													1,300,000
Amended and Restated Senior Credit Facility [Member] \| September 30, 2015 to December 31, 2015 [Member] \| TLB Facility Due on February 16, 2023 [Member]
Debt Instrument [Line Items]
Term loan repayments													$ 2,400,000
Amended and Restated Senior Credit Facility [Member] \| March 31, 2020 to December 31, 2020 [Member]
Debt Instrument [Line Items]
Term loan principal repayments									7,500,000
Term loan repayments												$ 1,300,000
Amended and Restated Senior Credit Facility [Member] \| March 31, 2020 to December 31, 2020 [Member] \| TLB Facility Due on February 16, 2023 [Member]
Debt Instrument [Line Items]
Term loan repayments												$ 2,400,000
Amended and Restated Senior Credit Facility [Member] \| March 31, 2021 to September 30, 2021 [Member]
Debt Instrument [Line Items]
Term loan principal repayments									$ 10,000,000

Long-Term Debt (6.125% Senior Notes due 2021) - Additional Information (Detail) - 6.125% Senior Notes Due 2021 [Member] - USD ($)		9 Months Ended
	Mar. 12, 2013	Sep. 30, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Issued Senior Notes	$ 150,000,000
Debt instrument interest rate	6.125%	6.125%	6.125%
Debt instrument maturity date	Mar. 15, 2021
Interest on the notes		Payable semi-annually in arrears on March 15 and September 15 of each year.

Long-Term Debt (5.125% Senior Notes due 2022) - Additional Information (Detail) - 5.125% Senior Notes Due 2022 [Member] - USD ($)		9 Months Ended
	Jul. 01, 2014	Sep. 30, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Issued Senior Notes	$ 300,000,000
Debt instrument interest rate	5.125%	5.125%	5.125%
Debt instrument maturity date	Jul. 01, 2022
Interest on the notes		Payable semi-annually in arrears on January 1 and July 1 of each year.

Long-Term Debt (5.625% Senior Notes due 2023) - Additional Information (Detail) - 5.625% Senior Notes Due 2023 [Member] - USD ($)	9 Months Ended
	Sep. 30, 2017	Dec. 31, 2016	Sep. 21, 2015	Feb. 11, 2015
Debt Instrument [Line Items]
Issued Senior Notes			$ 275,000,000	$ 375,000,000
Debt instrument interest rate	5.625%	5.625%	5.625%	5.625%
Senior Notes	$ 650,000,000	$ 650,000,000	$ 650,000,000
Debt instrument maturity date	Feb. 15, 2023

Long-Term Debt (6.500% Senior Notes due 2024) - Additional Information (Detail) - 6.500% Senior Notes Due 2024 [Member] - USD ($)		9 Months Ended
	Feb. 16, 2016	Sep. 30, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Issued Senior Notes	$ 390,000,000
Debt instrument interest rate	6.50%	6.50%	6.50%
Debt instrument maturity date	Mar. 01, 2024
Interest on the notes		Payable semi-annually in arrears on March 1 and September 1 of each year, beginning on September 1, 2016.

Long-Term Debt (9.0% and 9.5% Revenue Bonds) - Additional Information (Detail) - USD ($) $ in Thousands	Nov. 11, 2012	Sep. 30, 2017	Dec. 31, 2016
9.0% and 9.5% Revenue Bonds [Member]
Debt Instrument [Line Items]
9.0% and 9.5% Revenue Bonds		$ 22,175	$ 22,175
9.0% and 9.5% Revenue Bonds [Member] \| The Pavilion at HealthPark, LLC.
Debt Instrument [Line Items]
9.0% and 9.5% Revenue Bonds	$ 23,000
Debt service reserve fund within other assets		$ 2,300	$ 2,300
Debt instrument premium	2,600
9.0% and 9.5% Revenue Bonds [Member] \| Fair Value [Member] \| The Pavilion at HealthPark, LLC.
Debt Instrument [Line Items]
9.0% and 9.5% Revenue Bonds	25,600
9.0% Revenue Bonds [Member]
Debt Instrument [Line Items]
Debt instrument interest rate		9.00%	9.00%
9.0% Revenue Bonds [Member] \| The Pavilion at HealthPark, LLC.
Debt Instrument [Line Items]
9.0% and 9.5% Revenue Bonds	$ 7,500
Debt instrument interest rate	9.00%
Debt instrument maturity date	Dec. 01, 2030
9.5% Revenue Bonds [Member]
Debt Instrument [Line Items]
Debt instrument interest rate		9.50%	9.50%
9.5% Revenue Bonds [Member] \| The Pavilion at HealthPark, LLC.
Debt Instrument [Line Items]
9.0% and 9.5% Revenue Bonds	$ 15,500
Debt instrument interest rate	9.50%
Debt instrument maturity date	Dec. 01, 2040

Equity Offerings - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands			9 Months Ended
	Feb. 16, 2016	Jan. 12, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016	Mar. 03, 2016	Dec. 31, 2015
Equity [Line Items]
Common stock, number of shares proposed to be issued			180,000,000		180,000,000		90,000,000
Common stock offered		11,500,000	87,045,124		86,688,199
Common stock offer price		$ 61.00	$ 0.01		$ 0.01
Underwriting discount amount		$ 15,800
Additional offering-related costs		700
Net proceeds from sale of shares		$ 685,000	$ 0	$ 216,882
Priory [Member]
Equity [Line Items]
Total consideration related to acquisition	$ 2,200,000
Business acquisition cash paid	$ 1,900,000
Shares issued for acquisition	4,033,561
Maximum [Member] \| Amendment [Member]
Equity [Line Items]
Common stock, number of shares proposed to be issued						180,000,000

Equity-Based Compensation - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorized common stock	8,200,000		8,200,000
Equity incentive plan available for future grant	4,490,249		4,490,249
Annual increments in employee grants			25.00%
Stock options, contractual term			10 years
Equity-based compensation expense	$ 4,175,000	$ 7,145,000	$ 19,007,000	$ 20,989,000
Unrecognized compensation expense related to unvested options			$ 50,300,000
Vesting period			1 year 2 months 12 days
Warrant outstanding	0		$ 0
Deferred income tax benefit			29,416,000	25,857,000
Stock Compensation Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred income tax benefit	$ (1,500,000)	$ (2,900,000)	$ (7,300,000)	$ (8,300,000)

Equity-Based Compensation - Stock Option Activity (Detail) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Options outstanding, Beginning balance	1,000,946	694,743
Options granted	236,600	503,850
Options exercised	(81,992)	(57,397)
Options cancelled	(173,988)	(140,250)
Options outstanding, Ending balance	981,566	1,000,946	694,743
Options outstanding, Weighted Average Exercise Price, Beginning balance	$ 49.42	$ 42.87
Options exercisable, Ending balance	407,571	288,959
Options granted, Weighted Average Exercise Price	$ 43.11	$ 57.98
Options exercised, Weighted Average Exercise Price	26.48	31.92
Options cancelled, Weighted Average Exercise Price	54.73	57.13
Options outstanding, Weighted Average Exercise Price, Ending balance	$ 47.47	$ 49.42	$ 42.87
Options outstanding, Aggregate Intrinsic Value, Beginning balance	$ 8,166	$ 20,717
Options exercisable, Weighted Average Exercise Price, Ending balance	$ 41.02	$ 42.81
Options granted, Aggregate Intrinsic Value	$ 382	$ 297
Options granted, Weighted Average Remaining Contractual Term	9 years 5 months 27 days	9 years 3 months 11 days
Options exercised, Aggregate Intrinsic Value	$ 1,528	$ 1,530
Options outstanding, Weighted Average Remaining Contractual Term	7 years 7 months 17 days	7 years 9 months 18 days	7 years 8 months 12 days
Options cancelled, Aggregate Intrinsic Value	$ 0	$ 0
Options exercisable, Weighted Average Remaining Contractual Term, Ending balance	6 years 2 months 12 days	6 years 2 months 19 days
Options outstanding, Aggregate Intrinsic Value, Ending balance	$ 4,648	$ 8,166	$ 20,717
Options exercisable, Aggregate Intrinsic Value, Ending balance	$ 4,172	$ 6,111

Equity-Based Compensation - Restricted Stock Activity (Detail) - Restricted Stock Award [Member] - $ / shares	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested, Number of Shares/Units, Beginning balance	844,419	944,562
Granted, Number of Shares	371,924	387,347
Cancelled, Number of Shares	(124,743)	(122,178)
Vested, Number of Shares	(275,294)	(365,312)
Unvested, Number of Shares/Units, Ending balance	816,306	844,419
Unvested, Weighted Average Grant-Date Fair Value, Beginning balance	$ 55.76	$ 52.74
Granted, Weighted Average Grant-Date Fair Value	43.22	55.38
Cancelled, Weighted Average Grant-Date Fair Value	55.42	57.02
Vested, Weighted Average Grant-Date Fair Value	53.78	47.18
Unvested, Weighted Average Grant-Date Fair Value, Ending balance	$ 50.77	$ 55.76

Equity-Based Compensation - Restricted Stock Unit Activity (Detail) - Restricted Stock Units [Member] - $ / shares	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested, Number of Shares/Units, Beginning balance	273,599	218,084
Granted, Number of Units	219,840	230,750
Cancelled, Number of Units	0	0
Vested, Number of Units	(132,530)	(175,235)
Unvested, Number of Shares/Units, Ending balance	360,909	273,599
Unvested, Weighted Average Grant-Date Fair Value, Beginning balance	$ 59.68	$ 56.97
Granted, Weighted Average Grant-Date Fair Value	43.23	56.95
Cancelled, Weighted Average Grant-Date Fair Value	0	0
Vested, Weighted Average Grant-Date Fair Value	58.67	52.71
Unvested, Weighted Average Grant-Date Fair Value, Ending balance	$ 50.04	$ 59.68

Equity-Based Compensation - Schedule of Stock Options Valuation Assumptions (Detail) - $ / shares	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Weighted average grant-date fair value of options	$ 14.67	$ 18.96
Risk-free interest rate	2.00%	1.40%
Expected volatility	33.00%	33.00%
Expected life (in years)	5 years 6 months	5 years 6 months

Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Tax Examination [Line Items]
Increase in income tax provision due to adoption of ASU 2016-09			$ 1.7
Percentage increase in income tax provision due to adoption of ASU 2016-09			1.00%
Effective tax rates	26.00%	(2.10%)	26.30%	(292.80%)
Prior Period [Member]
Income Tax Examination [Line Items]
Adjustment for prior period excess tax benefits			$ 8.6

Derivative Instruments - Additional Information (Detail)	1 Months Ended		3 Months Ended	9 Months Ended
	May 31, 2016 USD ($)	May 31, 2016 GBP (£)	Sep. 30, 2016 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($)	Dec. 31, 2016	May 31, 2016 GBP (£)	Sep. 21, 2015 USD ($)	Feb. 11, 2015 USD ($)	Jul. 01, 2014 USD ($)	Mar. 12, 2013 USD ($)
Derivative [Line Items]
Cross currency swap assets					$ 26,200,000
Prior Period [Member]
Derivative [Line Items]
Gains associated with foreign currency forward contracts			$ 15,000	$ 500,000
6.125% Senior Notes Due 2021 [Member]
Derivative [Line Items]
Principal amount											$ 150,000,000
Debt instrument interest rate					6.125%	6.125%					6.125%
5.125% Senior Notes Due 2022 [Member]
Derivative [Line Items]
Principal amount										$ 300,000,000
Debt instrument interest rate					5.125%	5.125%				5.125%
5.625% Senior Notes Due 2023 [Member]
Derivative [Line Items]
Principal amount								$ 275,000,000	$ 375,000,000
Debt instrument interest rate					5.625%	5.625%		5.625%	5.625%
Cross Currency Swap Assets [Member]
Derivative [Line Items]
Notional amount	$ 650,000,000						£ 449,300,000
Cross currency swap agreement cash flow due to interest payment	$ 35,800,000	£ 24,700,000
Derivative exchange rate	1.45						1.45
Cross Currency Swap Assets [Member] \| 6.125% Senior Notes Due 2021 [Member]
Derivative [Line Items]
Principal amount	$ 150,000,000
Debt instrument interest rate	6.125%						6.125%
Cross Currency Swap Assets [Member] \| 5.125% Senior Notes Due 2022 [Member]
Derivative [Line Items]
Principal amount	$ 300,000,000
Debt instrument interest rate	5.125%						5.125%
Cross Currency Swap Assets [Member] \| 5.625% Senior Notes Due 2023 [Member]
Derivative [Line Items]
Principal amount	$ 200,000,000
Debt instrument interest rate	5.625%						5.625%

Fair Value Measurements - Carrying Amounts and Fair Values of Company's Amended and Restated Senior Credit Facilities and Contingent Consideration Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative instruments	$ 26,176	$ 73,509
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative instruments	26,176	73,509
Contingent consideration liabilities		107
Fair Value [Member] \| Amended and Restated Senior Credit Facility [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Amended and Restated Senior Credit Facility	1,778,798	1,799,993
Fair Value [Member] \| 6.125% Senior Notes Due 2021 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior Notes	152,359	152,186
Fair Value [Member] \| 5.125% Senior Notes Due 2022 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior Notes	306,466	293,595
Fair Value [Member] \| 5.625% Senior Notes Due 2023 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior Notes	673,632	640,574
Fair Value [Member] \| 6.500% Senior Notes due 2024 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior Notes	410,170	389,847
Fair Value [Member] \| 9.0% and 9.5% Revenue Bonds [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
9.0% and 9.5% Revenue Bonds	22,648	22,959
Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative instruments	26,176	73,509
Contingent consideration liabilities		107
Carrying Amount [Member] \| Amended and Restated Senior Credit Facility [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Amended and Restated Senior Credit Facility	1,778,798	1,799,993
Carrying Amount [Member] \| 6.125% Senior Notes Due 2021 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior Notes	147,964	147,574
Carrying Amount [Member] \| 5.125% Senior Notes Due 2022 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior Notes	295,988	295,442
Carrying Amount [Member] \| 5.625% Senior Notes Due 2023 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior Notes	641,554	640,574
Carrying Amount [Member] \| 6.500% Senior Notes due 2024 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior Notes	381,998	381,268
Carrying Amount [Member] \| 9.0% and 9.5% Revenue Bonds [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
9.0% and 9.5% Revenue Bonds	$ 22,648	$ 22,959

Fair Value Measurements - Additional Information (Detail)	Sep. 30, 2017	Dec. 31, 2016	Feb. 16, 2016	Sep. 21, 2015	Feb. 11, 2015	Jul. 01, 2014	Mar. 12, 2013
6.125% Senior Notes Due 2021 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	6.125%	6.125%					6.125%
5.125% Senior Notes Due 2022 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	5.125%	5.125%				5.125%
5.625% Senior Notes Due 2023 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	5.625%	5.625%		5.625%	5.625%
6.500% Senior Notes Due 2024 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	6.50%	6.50%	6.50%
9.0% Revenue Bonds [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	9.00%	9.00%
9.5% Revenue Bonds [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	9.50%	9.50%

Commitments and Contingencies - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2017 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Maximum professional liability aggregate policy limit	$ 78,000,000
Maximum professional liability aggregate retention level	3,000,000
Maximum professional liability risks reinsured in excess of retention level	$ 75,000,000

Noncontrolling Interests - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2017 Facilities
Noncontrolling Interest [Line Items]
Number of facilities operated by non-wholly owned subsidiaries	2
Minimum [Member]
Noncontrolling Interest [Line Items]
Equity ownership interests percentage in the facility	60.00%
Maximum [Member]
Noncontrolling Interest [Line Items]
Equity ownership interests percentage in the facility	75.00%

Other Current Assets - Other Current Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Other receivables	$ 30,910	$ 44,975
Prepaid expenses	28,874	27,455
Workers' compensation deposits - current portion	10,000	10,000
Income taxes receivable	9,472	11,714
Insurance receivable-current portion	6,472	6,472
Inventory	4,698	4,633
Other	1,981	2,288
Other current assets	$ 92,407	$ 107,537

Other Accrued Liabilities - Summary of Other Accrued Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Accounts Payable and Accrued Liabilities, Current [Abstract]
Accrued expenses	$ 39,610	$ 37,323
Unearned income	25,062	28,805
Accrued interest	15,058	33,616
Insurance liability - current portion	11,672	11,672
Income taxes payable	7,384	527
Accrued property taxes	5,257	2,732
Other	7,360	8,283
Other accrued liabilities	$ 111,403	$ 122,958

- Definition

The carrying amount of consideration received or receivable as of the balance sheet date on potential earnings that were not recognized as revenue in conformity with GAAP, and which are expected to be recognized as such within one year or the normal operating cycle, if longer, including sales, license fees, and royalties, but excluding interest income.

+ References + Details

Segment Information - Additional Information (Detail)	9 Months Ended
Segment Information - Additional Information (Detail)	Sep. 30, 2017 Beds State Facilities
Segment Reporting Information [Line Items]
Number of facilities \| Facilities	579
Number of beds \| Beds	17,400
Number of operating states \| State	39
U.S. Facilities [Member]
Segment Reporting Information [Line Items]
Number of facilities \| Facilities	208
Number of beds \| Beds	8,700
Number of operating states \| State	39
U.K. Facilities [Member]
Segment Reporting Information [Line Items]
Number of facilities \| Facilities	371
Number of beds \| Beds	8,700

Segment Information - Summary of Reconciliation of Segment EBITDA to Income before Income Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Segment Reporting Information [Line Items]
Revenue	$ 716,714	$ 734,665	$ 2,111,804	$ 2,108,026
Segment EBITDA	152,256	155,838	450,845	459,076
Equity-based compensation expense	(4,175)	(7,145)	(19,007)	(20,989)
Debt extinguishment costs		(3,411)	(810)	(3,411)
Loss on divestiture		(174,739)		(174,739)
Gain on foreign currency derivatives		15		523
Transaction-related expenses	(5,665)	(1,111)	(18,836)	(33,483)
Interest expense, net	(44,515)	(48,843)	(130,777)	(135,315)
Depreciation and amortization	(36,442)	(36,418)	(105,256)	(101,145)
Income (loss) before income taxes	61,459	(115,814)	176,159	(9,483)
U.S. Facilities [Member] \| Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenue	453,678	431,521	1,355,315	1,269,994
Segment EBITDA	118,744	108,810	359,250	334,230
U.K. Facilities [Member] \| Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenue	263,036	303,146	756,489	836,004
Segment EBITDA	50,665	67,795	146,941	185,664
Corporate and Other [Member] \| Corporate Reconciling Items and Eliminations [Member]
Segment Reporting Information [Line Items]
Revenue		(2)		2,028
Segment EBITDA	$ (17,153)	$ (20,767)	$ (55,346)	$ (60,818)

Segment Information - Summary of Financial Information by Operating Segment, Goodwill (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2017 USD ($)
Goodwill:
Beginning balance	$ 2,681,188
Foreign currency translation	55,260
Purchase price allocation and other	(6,086)
Ending balance	2,730,362
U.S. Facilities [Member] \| Operating Segment [Member]
Goodwill:
Beginning balance	2,041,795
Purchase price allocation and other	797
Ending balance	2,042,592
U.K. Facilities [Member] \| Operating Segment [Member]
Goodwill:
Beginning balance	639,393
Foreign currency translation	55,260
Purchase price allocation and other	(6,883)
Ending balance	$ 687,770

Segment Information - Summary of Financial Information by Operating Segment, Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Assets:
Assets	$ 6,342,586	$ 6,024,726
U.S. Facilities [Member] \| Operating Segment [Member]
Assets:
Assets	3,521,080	3,382,167
U.K. Facilities [Member] \| Operating Segment [Member]
Assets:
Assets	2,615,828	2,441,018
Corporate and Other [Member] \| Corporate Reconciling Items and Eliminations [Member]
Assets:
Assets	$ 205,678	$ 201,541

Segment Information - Summary of Financial Information by Operating Segment, Assets (Parenthetical) (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Segment Reporting, Asset Reconciling Item [Line Items]
Property and equipment, net	$ 2,966,215	$ 2,703,695
Operating Segment [Member] \| U.S. Facilities [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Property and equipment, net	1,100,000	1,000,000
Operating Segment [Member] \| U.K. Facilities [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Property and equipment, net	1,800,000	1,700,000
Corporate Reconciling Items and Eliminations [Member] \| Corporate and Other [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Property and equipment, net	$ 36,700	$ 27,100

Accumulated Other Comprehensive Loss - Components Of Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance			$ 2,167,724
Foreign currency translation gain (loss)	$ 69,622	$ (89,645)	188,744	$ (351,528)
(Loss) gain on derivative instruments, net of tax of $(18.8) million	(9,402)	$ 6,387	(24,354)	$ 30,306
Balance	2,487,585		2,487,585
Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance			(584,081)
Foreign currency translation gain (loss)			189,265
Balance	(394,816)		(394,816)
Change in Fair Value of Derivative Instruments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance			40,598
(Loss) gain on derivative instruments, net of tax of $(18.8) million			(24,354)
Balance	16,244		16,244
Pension Plan [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance			(6,087)
Foreign currency translation gain (loss)			(521)
Balance	(6,608)		(6,608)
Other Comprehensive Loss [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance			(549,570)
Balance	$ (385,180)		$ (385,180)

Accumulated Other Comprehensive Loss - Components Of Accumulated Other Comprehensive Loss (Parenthetical) (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
(Loss) gain on derivative instruments, tax	$ (6.7)	$ 3.6	$ (18.8)	$ 20.2

Financial Information for the Company and Its Subsidiaries - Additional Information (Detail)	Sep. 30, 2017	Dec. 31, 2016	Feb. 16, 2016	Sep. 21, 2015	Feb. 11, 2015	Jul. 01, 2014	Mar. 12, 2013
6.125% Senior Notes Due 2021 [Member]
Line of Credit Facility [Line Items]
Debt instrument interest rate	6.125%	6.125%					6.125%
5.125% Senior Notes Due 2022 [Member]
Line of Credit Facility [Line Items]
Debt instrument interest rate	5.125%	5.125%				5.125%
5.625% Senior Notes Due 2023 [Member]
Line of Credit Facility [Line Items]
Debt instrument interest rate	5.625%	5.625%		5.625%	5.625%
6.500% Senior Notes Due 2024 [Member]
Line of Credit Facility [Line Items]
Debt instrument interest rate	6.50%	6.50%	6.50%

Financial Information for the Company and Its Subsidiaries - Summary of Condensed Consolidating Balance Sheets (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 75,661	$ 57,063	$ 27,751	$ 11,215
Accounts receivable, net	295,756	263,327
Other current assets	92,407	107,537
Total current assets	463,824	427,927
Property and equipment, net	2,966,215	2,703,695
Goodwill	2,730,362	2,681,188
Intangible assets, net	86,951	83,310
Deferred tax assets - noncurrent	3,689	3,780
Derivative instruments	26,176	73,509
Other assets	65,369	51,317
Total assets	6,342,586	6,024,726
Current liabilities:
Current portion of long-term debt	34,805	34,805
Accounts payable	95,105	80,034
Accrued salaries and benefits	99,893	105,068
Other accrued liabilities	111,403	122,958
Total current liabilities	341,206	342,865
Long-term debt	3,234,146	3,253,004
Deferred tax liabilities - noncurrent	81,672	78,520
Other liabilities	179,329	164,859
Total liabilities	3,836,353	3,839,248
Redeemable noncontrolling interests	18,648	17,754
Total equity	2,487,585	2,167,724
Total liabilities and equity	6,342,586	6,024,726
Consolidating Adjustments [Member]
Current assets:
Deferred tax assets - noncurrent	(4,088)	(14,348)
Investment in subsidiaries	(5,228,165)	(4,885,865)
Other assets	(487,444)	(489,646)
Total assets	(5,719,697)	(5,389,859)
Current liabilities:
Long-term debt	(487,444)	(489,646)
Deferred tax liabilities - noncurrent	(4,088)	(14,348)
Total liabilities	(491,532)	(503,994)
Total equity	(5,228,165)	(4,885,865)
Total liabilities and equity	(5,719,697)	(5,389,859)
Parent [Member]
Current assets:
Deferred tax assets - noncurrent	3,378	13,522
Derivative instruments	26,176	73,509
Investment in subsidiaries	5,228,165	4,885,865
Other assets	490,535	493,294
Total assets	5,748,254	5,466,190
Current liabilities:
Current portion of long-term debt	34,550	34,550
Other accrued liabilities	14,365	33,616
Total current liabilities	48,915	68,166
Long-term debt	3,211,754	3,230,300
Total liabilities	3,260,669	3,298,466
Total equity	2,487,585	2,167,724
Total liabilities and equity	5,748,254	5,466,190
Combined Subsidiary Guarantors [Member]
Current assets:
Cash and cash equivalents	43,714	15,681	5,160	1,987
Accounts receivable, net	230,283	209,124
Other current assets	68,978	61,724
Total current assets	342,975	286,529
Property and equipment, net	1,042,800	940,880
Goodwill	1,936,057	1,935,260
Intangible assets, net	57,392	56,676
Other assets	53,903	40,480
Total assets	3,433,127	3,259,825
Current liabilities:
Accounts payable	62,655	49,205
Accrued salaries and benefits	68,271	72,835
Other accrued liabilities	12,392	24,375
Total current liabilities	143,318	146,415
Deferred tax liabilities - noncurrent	36,341	40,574
Other liabilities	112,094	101,938
Total liabilities	291,753	288,927
Total equity	3,141,374	2,970,898
Total liabilities and equity	3,433,127	3,259,825
Combined Non-Guarantors [Member]
Current assets:
Cash and cash equivalents	31,947	41,382	$ 22,591	$ 9,228
Accounts receivable, net	65,473	54,203
Other current assets	23,429	45,813
Total current assets	120,849	141,398
Property and equipment, net	1,923,415	1,762,815
Goodwill	794,305	745,928
Intangible assets, net	29,559	26,634
Deferred tax assets - noncurrent	4,399	4,606
Other assets	8,375	7,189
Total assets	2,880,902	2,688,570
Current liabilities:
Current portion of long-term debt	255	255
Accounts payable	32,450	30,829
Accrued salaries and benefits	31,622	32,233
Other accrued liabilities	84,646	64,967
Total current liabilities	148,973	128,284
Long-term debt	509,836	512,350
Deferred tax liabilities - noncurrent	49,419	52,294
Other liabilities	67,235	62,921
Total liabilities	775,463	755,849
Redeemable noncontrolling interests	18,648	17,754
Total equity	2,086,791	1,914,967
Total liabilities and equity	$ 2,880,902	$ 2,688,570

Financial Information for the Company and Its Subsidiaries - Summary of Condensed Consolidating Statement of Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Condensed Financial Statements, Captions [Line Items]
Revenue before provision for doubtful accounts	$ 728,712	$ 744,802	$ 2,143,696	$ 2,139,039
Provision for doubtful accounts	(11,998)	(10,137)	(31,892)	(31,013)
Revenue	716,714	734,665	2,111,804	2,108,026
Salaries, wages and benefits	385,562	408,242	1,145,578	1,157,557
Professional fees	53,042	47,687	142,772	137,970
Supplies	28,652	30,555	85,000	88,449
Rents and leases	19,049	19,740	57,455	55,013
Other operating expenses	82,328	79,748	249,161	230,950
Depreciation and amortization	36,442	36,418	105,256	101,145
Interest expense, net	44,515	48,843	130,777	135,315
Debt extinguishment costs		3,411	810	3,411
Loss on divestiture		174,739		174,739
Gain on foreign currency derivatives		(15)		(523)
Transaction-related expenses	5,665	1,111	18,836	33,483
Total expenses	655,255	850,479	1,935,645	2,117,509
(Loss) income before income taxes	61,459	(115,814)	176,159	(9,483)
(Benefit from) provision for income taxes	15,970	2,396	46,259	27,767
Net income (loss)	45,489	(118,210)	129,900	(37,250)
Net income (loss) attributable to noncontrolling interests	129	402	306	1,575
Net income (loss) attributable to Acadia Healthcare Company, Inc.	45,618	(117,808)	130,206	(35,675)
Other comprehensive income (loss):
Foreign currency translation gain (loss)	69,622	(89,645)	188,744	(351,528)
(Loss) gain on derivative instruments	(9,402)	6,387	(24,354)	30,306
Other comprehensive income (loss)	60,220	(83,258)	164,390	(321,222)
Comprehensive income (loss) attributable to Acadia Healthcare Company, Inc.	105,838	(201,066)	294,596	(356,897)
Consolidating Adjustments [Member]
Condensed Financial Statements, Captions [Line Items]
Equity in earnings of subsidiaries	(55,925)	99,875	(163,931)	(8,937)
Net income (loss)	(55,925)	99,875	(163,931)	(8,937)
Net income (loss) attributable to Acadia Healthcare Company, Inc.	(55,925)	99,875	(163,931)	(8,937)
Other comprehensive income (loss):
Comprehensive income (loss) attributable to Acadia Healthcare Company, Inc.	(55,925)	99,875	(163,931)	(8,937)
Parent [Member]
Condensed Financial Statements, Captions [Line Items]
Salaries, wages and benefits	4,175	7,145	19,007	20,989
Interest expense, net	15,933	13,388	46,392	37,452
Debt extinguishment costs		3,411	810	3,411
Gain on foreign currency derivatives		(15)		(523)
Total expenses	20,108	23,929	66,209	61,329
(Loss) income before income taxes	(20,108)	(23,929)	(66,209)	(61,329)
Equity in earnings of subsidiaries	55,925	(99,875)	163,931	8,937
(Benefit from) provision for income taxes	(9,672)	(5,594)	(32,178)	(15,142)
Net income (loss)	45,489	(118,210)	129,900	(37,250)
Net income (loss) attributable to Acadia Healthcare Company, Inc.	45,489	(118,210)	129,900	(37,250)
Other comprehensive income (loss):
(Loss) gain on derivative instruments	(9,402)	6,387	(24,354)	30,306
Other comprehensive income (loss)	(9,402)	6,387	(24,354)	30,306
Comprehensive income (loss) attributable to Acadia Healthcare Company, Inc.	36,087	(111,823)	105,546	(6,944)
Combined Subsidiary Guarantors [Member]
Condensed Financial Statements, Captions [Line Items]
Revenue before provision for doubtful accounts	440,423	420,061	1,311,937	1,245,227
Provision for doubtful accounts	(10,310)	(9,383)	(28,007)	(28,318)
Revenue	430,113	410,678	1,283,930	1,216,909
Salaries, wages and benefits	225,001	224,692	675,206	648,669
Professional fees	24,385	21,140	69,796	66,967
Supplies	18,843	19,467	56,502	57,456
Rents and leases	8,127	8,759	25,139	25,857
Other operating expenses	55,077	51,536	164,596	151,485
Depreciation and amortization	16,963	15,105	48,918	42,072
Interest expense, net	19,304	19,258	57,054	57,394
Transaction-related expenses	2,211		6,219	25,624
Total expenses	369,911	359,957	1,103,430	1,075,524
(Loss) income before income taxes	60,202	50,721	180,500	141,385
(Benefit from) provision for income taxes	21,202	38,654	66,124	62,247
Net income (loss)	39,000	12,067	114,376	79,138
Net income (loss) attributable to Acadia Healthcare Company, Inc.	39,000	12,067	114,376	79,138
Other comprehensive income (loss):
Comprehensive income (loss) attributable to Acadia Healthcare Company, Inc.	39,000	12,067	114,376	79,138
Combined Non-Guarantors [Member]
Condensed Financial Statements, Captions [Line Items]
Revenue before provision for doubtful accounts	288,289	324,741	831,759	893,812
Provision for doubtful accounts	(1,688)	(754)	(3,885)	(2,695)
Revenue	286,601	323,987	827,874	891,117
Salaries, wages and benefits	156,386	176,405	451,365	487,899
Professional fees	28,657	26,547	72,976	71,003
Supplies	9,809	11,088	28,498	30,993
Rents and leases	10,922	10,981	32,316	29,156
Other operating expenses	27,251	28,212	84,565	79,465
Depreciation and amortization	19,479	21,313	56,338	59,073
Interest expense, net	9,278	16,197	27,331	40,469
Loss on divestiture		174,739		174,739
Transaction-related expenses	3,454	1,111	12,617	7,859
Total expenses	265,236	466,593	766,006	980,656
(Loss) income before income taxes	21,365	(142,606)	61,868	(89,539)
(Benefit from) provision for income taxes	4,440	(30,664)	12,313	(19,338)
Net income (loss)	16,925	(111,942)	49,555	(70,201)
Net income (loss) attributable to noncontrolling interests	129	402	306	1,575
Net income (loss) attributable to Acadia Healthcare Company, Inc.	17,054	(111,540)	49,861	(68,626)
Other comprehensive income (loss):
Foreign currency translation gain (loss)	69,622	(89,645)	188,744	(351,528)
Other comprehensive income (loss)	69,622	(89,645)	188,744	(351,528)
Comprehensive income (loss) attributable to Acadia Healthcare Company, Inc.	$ 86,676	$ (201,185)	$ 238,605	$ (420,154)

Financial Information for the Company and Its Subsidiaries - Summary of Condensed Consolidating Statement of Cash Flows (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Operating activities:
Net income (loss)	$ 45,489	$ (118,210)	$ 129,900	$ (37,250)
Adjustments to reconcile net income (loss) to net cash (used in) provided by continuing operating activities:
Depreciation and amortization	36,442	36,418	105,256	101,145
Amortization of debt issuance costs			7,340	7,714
Equity-based compensation expense	4,175	7,145	19,007	20,989
Deferred income tax (benefit) expense			29,416	25,857
Debt extinguishment costs		3,411	810	3,411
Loss on divestiture		174,739		174,739
Gain on foreign currency derivatives		(15)		(523)
Other			10,672	731
Change in operating assets and liabilities, net of effect of acquisitions:
Accounts receivable, net			(28,681)	(12,579)
Other current assets			26,099	(12,973)
Other assets			(566)	(1,134)
Accounts payable and other accrued liabilities			(26,381)	2,067
Accrued salaries and benefits			(7,937)	(10,759)
Other liabilities			7,677	3,746
Net cash provided by continuing operating activities			272,612	265,181
Net cash used in discontinued operating activities			(1,261)	(5,524)
Net cash (used in) provided by operating activities			271,351	259,657
Investing activities:
Cash paid for acquisitions, net of cash acquired			0	(683,285)
Cash paid for capital expenditures			(193,817)	(249,961)
Cash paid for real estate acquisitions			(33,297)	(37,947)
Settlement of foreign currency derivatives				523
Other			(6,062)	(1,135)
Net cash used in investing activities			(233,176)	(971,805)
Financing activities:
Borrowings on long-term debt				1,480,000
Borrowings on revolving credit facility				179,000
Principal payments on revolving credit facility				(166,000)
Principal payments on long-term debt			(25,913)	(46,069)
Repayment of assumed debt				(1,348,389)
Payment of debt issuance costs				(35,748)
Issuance of common stock				685,097
Common stock withheld for minimum statutory taxes, net			(3,278)	(7,917)
Other			1,649	(1,821)
Net cash (used in) provided by financing activities			(27,542)	738,153
Effect of exchange rate changes on cash			7,965	(9,469)
Net increase in cash and cash equivalents			18,598	16,536
Cash and cash equivalents at beginning of the period			57,063	11,215
Cash and cash equivalents at end of the period	75,661	27,751	75,661	27,751
Consolidating Adjustments [Member]
Operating activities:
Net income (loss)	(55,925)	99,875	(163,931)	(8,937)
Adjustments to reconcile net income (loss) to net cash (used in) provided by continuing operating activities:
Equity in earnings of subsidiaries	55,925	(99,875)	163,931	8,937
Change in operating assets and liabilities, net of effect of acquisitions:
Other assets			(3,479)	2,780
Net cash provided by continuing operating activities			(3,479)	2,780
Net cash (used in) provided by operating activities			(3,479)	2,780
Financing activities:
Principal payments on long-term debt			3,479	2,780
Cash (used in) provided by intercompany activity				(5,560)
Net cash (used in) provided by financing activities			3,479	(2,780)
Parent [Member]
Operating activities:
Net income (loss)	45,489	(118,210)	129,900	(37,250)
Adjustments to reconcile net income (loss) to net cash (used in) provided by continuing operating activities:
Equity in earnings of subsidiaries	(55,925)	99,875	(163,931)	(8,937)
Amortization of debt issuance costs			7,652	8,035
Equity-based compensation expense			19,007	20,989
Deferred income tax (benefit) expense			156
Debt extinguishment costs		3,411	810	3,411
Gain on foreign currency derivatives		(15)		(523)
Other			4,216
Change in operating assets and liabilities, net of effect of acquisitions:
Other assets			3,479	(2,780)
Net cash provided by continuing operating activities			1,289	(17,055)
Net cash (used in) provided by operating activities			1,289	(17,055)
Financing activities:
Borrowings on long-term debt				1,480,000
Borrowings on revolving credit facility				179,000
Principal payments on revolving credit facility				(166,000)
Principal payments on long-term debt			(25,913)	(46,069)
Repayment of assumed debt				(1,348,389)
Payment of debt issuance costs				(35,748)
Issuance of common stock				685,097
Common stock withheld for minimum statutory taxes, net			(3,278)	(7,917)
Cash (used in) provided by intercompany activity			27,902	(722,919)
Net cash (used in) provided by financing activities			(1,289)	17,055
Combined Subsidiary Guarantors [Member]
Operating activities:
Net income (loss)	39,000	12,067	114,376	79,138
Adjustments to reconcile net income (loss) to net cash (used in) provided by continuing operating activities:
Depreciation and amortization	16,963	15,105	48,918	42,072
Deferred income tax (benefit) expense			22,401	26,381
Other			1,727	826
Change in operating assets and liabilities, net of effect of acquisitions:
Accounts receivable, net			(21,183)	(26,055)
Other current assets			1,126	(4,901)
Other assets			(705)	(818)
Accounts payable and other accrued liabilities			(22,372)	31,633
Accrued salaries and benefits			(4,759)	3,527
Other liabilities			4,084	5,975
Net cash provided by continuing operating activities			143,613	157,778
Net cash used in discontinued operating activities			(1,261)	(5,524)
Net cash (used in) provided by operating activities			142,352	152,254
Investing activities:
Cash paid for acquisitions, net of cash acquired				(103,189)
Cash paid for capital expenditures			(114,130)	(142,626)
Cash paid for real estate acquisitions			(33,297)	(26,146)
Settlement of foreign currency derivatives				523
Other			(7,984)	(1,135)
Net cash used in investing activities			(155,411)	(272,573)
Financing activities:
Other			1,649	(1,821)
Cash (used in) provided by intercompany activity			39,443	125,313
Net cash (used in) provided by financing activities			41,092	123,492
Net increase in cash and cash equivalents			28,033	3,173
Cash and cash equivalents at beginning of the period			15,681	1,987
Cash and cash equivalents at end of the period	43,714	5,160	43,714	5,160
Combined Non-Guarantors [Member]
Operating activities:
Net income (loss)	16,925	(111,942)	49,555	(70,201)
Adjustments to reconcile net income (loss) to net cash (used in) provided by continuing operating activities:
Depreciation and amortization	19,479	21,313	56,338	59,073
Amortization of debt issuance costs			(312)	(321)
Deferred income tax (benefit) expense			6,859	(524)
Loss on divestiture		174,739		174,739
Other			4,729	(95)
Change in operating assets and liabilities, net of effect of acquisitions:
Accounts receivable, net			(7,498)	13,476
Other current assets			24,973	(8,072)
Other assets			139	(316)
Accounts payable and other accrued liabilities			(4,009)	(29,566)
Accrued salaries and benefits			(3,178)	(14,286)
Other liabilities			3,593	(2,229)
Net cash provided by continuing operating activities			131,189	121,678
Net cash (used in) provided by operating activities			131,189	121,678
Investing activities:
Cash paid for acquisitions, net of cash acquired				(580,096)
Cash paid for capital expenditures			(79,687)	(107,335)
Cash paid for real estate acquisitions				(11,801)
Other			1,922
Net cash used in investing activities			(77,765)	(699,232)
Financing activities:
Principal payments on long-term debt			(3,479)	(2,780)
Cash (used in) provided by intercompany activity			(67,345)	603,166
Net cash (used in) provided by financing activities			(70,824)	600,386
Effect of exchange rate changes on cash			7,965	(9,469)
Net increase in cash and cash equivalents			(9,435)	13,363
Cash and cash equivalents at beginning of the period			41,382	9,228
Cash and cash equivalents at end of the period	$ 31,947	$ 22,591	$ 31,947	$ 22,591