Document and Entity Information	9 Months Ended
Document and Entity Information	Sep. 30, 2013	Oct. 30, 2013
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q3
Entity Registrant Name	Acadia Healthcare Company, Inc.
Entity Central Index Key	0001520697
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		50,522,054

Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 4,034	$ 49,399
Accounts receivable, net of allowance for doubtful accounts of $13,108 and $7,484, respectively	93,311	63,870
Deferred tax assets	13,019	11,380
Other current assets	32,516	16,332
Total current assets	142,880	140,981
Property and equipment, net	329,735	236,942
Goodwill	647,010	557,402
Intangible assets, net	19,183	15,988
Other assets	24,178	32,100
Total assets	1,162,986	983,413
Current liabilities:
Current portion of long-term debt	13,305	7,680
Accounts payable	26,449	19,081
Accrued salaries and benefits	32,284	28,749
Other accrued liabilities	29,235	16,341
Total current liabilities	101,273	71,851
Long-term debt	571,955	465,638
Deferred tax liabilities - noncurrent	4,979	998
Other liabilities	18,246	12,376
Total liabilities	696,453	550,863
Equity:
Preferred stock, $0.01 par value; 10,000,000 shares authorized; no shares issued
Common stock, $0.01 par value; 90,000,000 shares authorized; 50,041,813 and 49,887,300 shares issued and outstanding as of September 30, 2013 and December 31, 2012, respectively	500	499
Additional paid-in capital	459,911	456,228
Retained earnings (accumulated deficit)	6,122	(24,177)
Total equity	466,533	432,550
Total liabilities and equity	$ 1,162,986	$ 983,413

Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Statement Of Financial Position [Abstract]
Receivable, allowance for doubtful accounts	$ 13,108	$ 7,484
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	90,000,000	90,000,000
Common stock, shares issued	50,041,813	49,887,300
Common stock, shares outstanding	50,041,813	49,887,300

Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income Statement [Abstract]
Revenue before provision for doubtful accounts	$ 190,574	$ 104,618	$ 539,230	$ 298,638
Provision for doubtful accounts	(5,872)	(1,502)	(15,821)	(5,429)
Revenue	184,702	103,116	523,409	293,209
Salaries, wages and benefits (including equity-based compensation expense of $1,331, $521, $3,744 and $1,691, respectively)	103,789	59,888	298,904	173,590
Professional fees	8,956	4,690	27,294	13,521
Supplies	9,806	4,831	28,017	14,148
Rents and leases	2,656	1,775	7,377	6,244
Other operating expenses	22,345	11,380	59,424	30,768
Depreciation and amortization	4,414	2,076	12,248	5,332
Interest expense, net	9,465	7,433	27,672	22,186
Debt extinguishment costs			9,350
Transaction-related expenses	984	732	3,813	2,097
Total expenses	162,415	92,805	474,099	267,886
Income from continuing operations before income taxes	22,287	10,311	49,310	25,323
Provision for income taxes	7,741	3,723	18,439	9,307
Income from continuing operations	14,546	6,588	30,871	16,016
(Loss) income from discontinued operations, net of income taxes	(182)	(138)	(572)	22
Net income	$ 14,364	$ 6,450	$ 30,299	$ 16,038
Basic earnings per share:
Income from continuing operations	$ 0.29	$ 0.16	$ 0.62	$ 0.44
Loss from discontinued operations		$ (0.01)	$ (0.01)
Net income	$ 0.29	$ 0.15	$ 0.61	$ 0.44
Diluted earnings per share:
Income from continuing operations	$ 0.29	$ 0.16	$ 0.61	$ 0.43
Loss from discontinued operations		$ (0.01)	$ (0.01)
Net income	$ 0.29	$ 0.15	$ 0.60	$ 0.43
Weighted-average shares outstanding:
Basic	50,040	41,757	49,987	36,795
Diluted	50,343	41,991	50,213	37,006

Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Operating activities:
Net income	$ 30,299	$ 16,038
Adjustments to reconcile net income to net cash provided by continuing operating activities:
Depreciation and amortization	12,248	5,332
Amortization of debt issuance costs	1,686	1,869
Equity-based compensation expense	3,744	1,691
Deferred income tax expense	10,545	8,138
Loss (income) from discontinued operations, net of taxes	572	(22)
Debt extinguishment costs	9,350
Other	16	(9)
Accounts receivable, net	(18,378)	(13,597)
Other current assets	(5,657)	(3,677)
Other assets	(1,676)	1,029
Accounts payable and other accrued liabilities	2,596	4,817
Accrued salaries and benefits	(3,467)	527
Other liabilities	3,538	1,527
Net cash provided by continuing operating activities	45,416	23,663
Net cash used in discontinued operating activities	(541)	(328)
Net cash provided by operating activities	44,875	23,335
Investing activities:
Cash paid for acquisitions, net of cash acquired	(135,605)	(165,981)
Cash paid for capital expenditures	(50,678)	(14,511)
Cash paid for real estate acquisitions	(4,676)	(50,745)
Other	(1,088)	1,231
Net cash used in investing activities	(192,047)	(230,006)
Financing activities:
Borrowings on long-term debt	150,000	25,000
Net increase in revolving credit facility	19,500
Principal payments on long-term debt	(5,625)	(6,000)
Repayment of long-term debt	(52,500)
Payment of debt issuance costs	(4,307)	(1,197)
Payment of premium on note redemption	(6,759)
Issuance of common stock		138,954
Proceeds from stock option exercises	233	515
Excess tax benefit from equity awards	1,265
Net cash provided by financing activities	101,807	157,272
Net decrease in cash and cash equivalents	(45,365)	(49,399)
Cash and cash equivalents at beginning of the period	49,399	61,118
Cash and cash equivalents at end of the period	4,034	11,719
Effect of acquisitions:
Assets acquired, excluding cash	163,706	172,267
Liabilities assumed	(16,417)	(6,286)
Prior year deposits paid for acquisitions	(11,684)
Cash paid for acquisitions, net of cash acquired	$ 135,605	$ 165,981

Description of Business and Basis of Presentation	9 Months Ended
Description of Business and Basis of Presentation	Sep. 30, 2013
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. At September 30, 2013, the Company operated 47 behavioral healthcare facilities with approximately 3,900 licensed beds in 21 states and Puerto Rico. *Basis of Presentation* The business of the Company is conducted through limited liability companies and C-corporations, each of which is a direct or indirect wholly-owned subsidiary of the Company. The Company’s consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries, all of which are 100% owned. All significant 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, 2012 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, 2012 included in the Company’s Annual Report on Form 10-K filed with the Securities and Exchange Commission on March 1, 2013. 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.

Earnings Per Share

9 Months Ended

Sep. 30, 2013

Earnings Per Share [Abstract]

Earnings Per Share

2. Earnings Per Share

Basic and diluted earnings per share are calculated in accordance with Financial Accounting Standards Board Accounting 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, 2013 and 2012 (in thousands except per share amounts):


	Three Months Ended September 30,						Nine Months Ended September 30,
	2013			2012			2013			2012
Numerator:
Basic and diluted earnings per share:
Income from continuing operations	$	14,546		$	6,588		$	30,871		$	16,016
(Loss) income from discontinued operations		(182	)		(138	)		(572	)		22

Net income	$	14,364		$	6,450		$	30,299		$	16,038

Denominator:
Weighted average shares outstanding for basic earnings per share		50,040			41,757			49,987			36,795
Effects of dilutive instruments		303			234			226			211

Shares used in computing diluted earnings per common share		50,343			41,991			50,213			37,006

Basic earnings per share:
Income from continuing operations	$	0.29		$	0.16		$	0.62		$	0.44
Loss from discontinued operations		—			(0.01	)		(0.01	)		—

Net income	$	0.29		$	0.15		$	0.61		$	0.44

Diluted earnings per share:
Income from continuing operations	$	0.29		$	0.16		$	0.61		$	0.43
Loss from discontinued operations		—			(0.01	)		(0.01	)		—

Net income	$	0.29		$	0.15		$	0.60		$	0.43

Approximately 0.4 million shares of common stock issuable upon exercise of outstanding stock option awards were excluded from the calculation of diluted earnings per share for both the three months ended September 30, 2013 and 2012 because their effect would have been anti-dilutive. Approximately 0.7 million and 0.4 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, 2013 and 2012, respectively, because their effect would have been anti-dilutive.

Acquisitions

9 Months Ended

Sep. 30, 2013

Business Combinations [Abstract]

Acquisitions

3. Acquisitions

Longleaf

On October 1, 2013, the Company completed its acquisition of the assets of Longleaf Hospital (“Longleaf”), an inpatient psychiatric facility with 68 licensed beds located in Alexandria, Louisiana, for cash consideration of $8.5 million.

The Refuge

On August 1, 2013, the Company completed its acquisition of The Refuge, a Healing Place (“The Refuge”), an inpatient psychiatric facility near Ocala, Florida, licensed for 87 beds, for cash consideration of $14.1 million.

UMC Facilities

On May 1, 2013, the Company completed its acquisition of two facilities from United Medical Corporation (the “UMC Facilities”), including San Juan Capestrano Hospital in San Juan, Puerto Rico, which is licensed for 108 beds and has a certificate of need for 100 additional beds, and a 75-bed inpatient behavioral healthcare hospital in Tampa, Florida, which opened on October 1, 2013, for cash consideration of $99.4 million.

Delta Medical Center

On January 31, 2013, the Company completed its acquisition of DMC-Memphis, Inc. d/b/a Delta Medical Center (“Delta”), a facility with 243 licensed beds located in Memphis, Tennessee with the majority of operating beds dedicated to inpatient psychiatric patients, for cash consideration of $23.1 million.

Greenleaf Center

On January 1, 2013, the Company completed its acquisition of the assets of Greenleaf Center (“Greenleaf”), an inpatient psychiatric facility with 50 licensed beds located in Valdosta, Georgia, for cash consideration of $6.3 million.

2012 Acquisitions

On December 31, 2012, the Company completed the acquisition of Behavioral Centers of America, LLC (“BCA”) and AmiCare Behavioral Centers, LLC (“AmiCare”). On November 11, 2012, the Company purchased 100% of the membership interests of The Pavilion at HealthPark, LLC (“Park Royal”). On August 31, 2012, the Company completed the acquisition of the assets of Timberline Knolls, LLC (“Timberline Knolls”). On March 1, 2012, the Company completed its acquisition of three inpatient psychiatric hospitals (the “Haven Facilities”) from Haven Behavioral Healthcare Holdings, LLC.

Summary of Acquisitions

The Company selectively seeks opportunities to expand and diversify its base of operations by acquiring additional facilities. The majority of the goodwill associated with the acquisitions completed in 2013 and 2012 is deductible for federal income tax purposes. The fair values assigned to certain assets and liabilities assumed by the Company have been estimated on a preliminary basis and are subject to change as new facts and circumstances emerge that were present at the date of acquisition. Specifically, the Company is further assessing the valuation of certain tax matters as well as certain receivables and assumed liabilities of The Refuge, the UMC Facilities, Delta, Greenleaf, BCA, AmiCare and Park Royal and the valuation of real property and intangible assets of The Refuge. The Company expects to finalize its analyses as the necessary information becomes available to complete the measurement process. Once finalized, the Company will adjust the application of the acquisition method of accounting to reflect its final valuations.

The preliminary fair values of assets acquired and liabilities assumed during the nine months ended September 30, 2013 were as follows (in thousands):


	UMC Facilities		Other		Total
Cash	$	52	$	883	$	935
Accounts receivable		5,251		6,120		11,371
Prepaid expenses and other current assets		557		3,189		3,746
Property and equipment		22,732		28,088		50,820
Goodwill		67,544		22,592		90,136
Intangible assets		1,505		1,406		2,911
Other assets		4,563		159		4,722

Total assets acquired		102,204		62,437		164,641
Accounts payable		1,535		7,290		8,825
Accrued salaries and benefits		588		2,594		3,182
Other accrued expenses		609		1,195		1,804
Other liabilities		53		2,553		2,606

Total liabilities assumed		2,785		13,632		16,417

Net assets acquired	$	99,419	$	48,805	$	148,224

The following table presents the preliminary fair values of assets acquired and liabilities assumed during 2012, at the corresponding acquisition dates (except that information for the Haven Facilities and Timberline Knolls reflect final fair values) (in thousands):


	BCA		AmiCare		Park Royal		Timberline Knolls		Haven Facilities		Total
Cash	$	5	$	1,596	$	42	$	—	$	5	$	1,648
Accounts receivable		6,980		3,684		1,450		2,845		4,138		19,097
Prepaid expenses and other current assets		1,291		1,509		1,258		170		803		5,031
Property and equipment		23,561		23,150		18,291		590		12,723		78,315
Goodwill		116,609		86,491		19,320		72,164		74,435		369,019
Intangible assets		1,161		1,267		1,035		3,317		1,200		7,980
Other assets		326		—		3,141		—		—		3,467

Total assets acquired		149,933		117,697		44,537		79,086		93,304		484,557
Accounts payable		3,602		504		695		2,011		1,183		7,995
Accrued salaries and benefits		2,207		2,508		443		653		1,523		7,334
Other accrued expenses		697		627		1,079		869		127		3,399
Debt		—		—		25,600		—		—		25,600
Other liabilities		475		1,495		—		—		—		1,970

Total liabilities assumed		6,981		5,134		27,817		3,533		2,833		46,298

Net assets acquired	$	142,952	$	112,563	$	16,720	$	75,553	$	90,471	$	438,259

Other

The qualitative factors comprising the goodwill acquired in The Refuge, the UMC Facilities, Delta, Greenleaf, BCA, AmiCare, Park Royal, Timberline Knolls and the Haven Facilities 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 were comprised of the following costs for the three and nine months ended September 30, 2013 and 2012 (in thousands):


	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
Legal, accounting and other fees	$	841	$	629	$	2,644	$	1,958
Severance and contract termination costs		143		103		1,169		139

	$	984	$	732	$	3,813	$	2,097

Pro Forma Information

The condensed consolidated statements of operations for the three and nine months ended September 30, 2013 include revenue of $87.7 million and $234.6 million, respectively, and income from continuing operations before income taxes of $11.1 million and $26.0 million, respectively, related to acquisitions completed in 2013 and 2012. The condensed consolidated statements of operations for the three and nine months ended September 30, 2012 include revenue of $14.2 million and $29.2 million, respectively, and income from continuing operations before income taxes of $2.8 million and $5.5 million, respectively, related to acquisitions completed in 2012.

The following table provides certain pro forma financial information for the Company as if the acquisitions completed in 2013 and 2012 occurred as of January 1, 2012 (in thousands):


	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
Revenue	$	185,752	$	163,935	$	542,637	$	489,612

Income from continuing operations, before income taxes	$	22,357	$	13,553	$	50,888	$	39,082

Goodwill and Other Intangible Assets

9 Months Ended

Sep. 30, 2013

Goodwill And Intangible Assets Disclosure [Abstract]

Goodwill and Other Intangible Assets

4. Goodwill and Other Intangible Assets

The following table summarizes changes in goodwill during the nine months ended September 30, 2013 (in thousands):


Balance at January 1, 2013	$	557,402
Increase from 2013 acquisitions		90,136
Other		(528	)

Balance at September 30, 2013	$	647,010

Other identifiable intangible assets and related accumulated amortization consists of the following as of September 30, 2013 and December 31, 2012 (in thousands):


	Gross Carrying Amount				Accumulated Amortization
	September 30, 2013		December 31, 2012		September 30, 2013			December 31, 2012
Intangible assets subject to amortization:
Contract intangible assets	$	2,100	$	2,100	$	(805	)	$	(490	)
Non-compete agreements		1,247		1,247		(964	)		(684	)

		3,347		3,347		(1,769	)		(1,174	)
Intangible assets not subject to amortization:
Licenses and accreditations		7,711		6,969		—			—
Trade names		3,000		3,000		—			—
Certificates of need		6,894		3,846		—			—

		17,605		13,815		—			—

Total	$	20,952	$	17,162	$	(1,769	)	$	(1,174	)

In connection with the Greenleaf acquisition, the Company acquired a certificate of need with a fair value of $0.6 million. In connection with the Delta acquisition, the Company acquired intangible assets with a fair value of $0.8 million consisting of licenses and accreditations of $0.2 million and a certificate of need of $0.6 million. In connection with the UMC Facilities’ acquisition, the Company acquired intangible assets with a fair value of $1.5 million consisting of licenses and accreditations of $0.2 million and certificates of need of $1.3 million.

In connection with the Haven Facilities acquisition, the Company acquired intangible assets with a fair value of $1.2 million consisting of non-compete agreements of $0.2 million, licenses and accreditations of $0.8 million and a certificate of need of $0.2 million. In connection with the Timberline Knolls acquisition, the Company acquired intangible assets with a fair value of $3.3 million consisting of non-compete agreements of $0.2 million, licenses and accreditations of $0.1 million and a trade name of $3.0 million. In connection with the Park Royal acquisition, the Company acquired intangible assets with a fair value of $1.0 million consisting of a certificate of need of $0.7 million and licenses and accreditations of $0.3 million. In connection with the AmiCare acquisition, the Company acquired intangible assets with a fair value of $1.3 million consisting of non-compete agreements of $0.3 million, licenses and accreditations of $0.8 million and a certificate of need of $0.2 million. In connection with the BCA acquisition, the Company acquired intangible assets with a fair value of $1.2 million consisting of non-compete agreements of $0.1 million, licenses and accreditations of $1.0 million and a certificate of need of $0.1 million. The Company incurred and capitalized $0.6 million and $0.4 million in the nine months ended September 30, 2013 and 2012, respectively, related to costs to obtain certificates of need.

The non-compete agreements are being amortized on a straight-line basis over the term of the agreements. The Timberline Knolls and BCA non-compete agreements have a one-year term, and the Haven Facilities and AmiCare non-compete agreements have a three-year term. The contract intangible is amortized on a straight-line basis over the estimated five-year term of the related contract.

Amortization expense related to definite-lived intangible assets was $0.2 million and $0.1 million for the three months ended September 30, 2013 and 2012, respectively, and $0.6 million and $0.5 million for the nine months ended September 30, 2013 and 2012, respectively. Estimated amortization expense for the years ending December 31, 2013, 2014, 2015, 2016 and 2017 is $0.8 million, $0.6 million, $0.5 million, $0.3 million and $0, respectively. 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, 2013

Property Plant And Equipment [Abstract]

Property and Equipment

5. Property and Equipment

Property and equipment consists of the following as of September 30, 2013 and December 31, 2012 (in thousands):


	September 30, 2013			December 31, 2012
Land	$	50,312		$	39,130
Building and improvements		227,205			171,769
Equipment		33,715			19,773
Construction in progress		43,395			19,300

		354,627			249,972
Less accumulated depreciation		(24,892	)		(13,030	)

Property and equipment, net	$	329,735		$	236,942

Discontinued Operations

9 Months Ended

Sep. 30, 2013

Discontinued Operations And Disposal Groups [Abstract]

Discontinued Operations

6. Discontinued Operations

GAAP requires that all components of an entity that have been disposed of (by sale, by abandonment or in a distribution to owners) or are held for sale and whose cash flows can be clearly distinguished from the rest of the entity be presented as discontinued operations. In June 2012, the Company disposed of its PsychSolutions facility located in Miami, Florida. The results of operations of this facility have been reported as discontinued operations in the accompanying consolidated financial statements.

A summary of results from discontinued operations is as follows (in thousands):


	Three Months Ended September 30,						Nine Months Ended September 30,
	2013			2012			2013			2012
Revenue	$	(264	)	$	—		$	(363	)	$	3,570

(Loss) income from discontinued operations, net of income taxes	$	(182	)	$	(138	)	$	(572	)	$	22

Long-Term Debt

9 Months Ended

Sep. 30, 2013

Debt Disclosure [Abstract]

Long-Term Debt

7. Long-Term Debt

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


	September 30, 2013			December 31, 2012
Amended and Restated Senior Credit Facility:
Senior Secured Term Loans	$	294,375		$	300,000
Senior Secured Revolving Line of Credit		19,500			—
12.875% Senior Notes due 2018		96,171			147,757
6.125% Senior Notes due 2021		150,000			—
9.0% and 9.5% Revenue Bonds		25,214			25,561

		585,260			473,318
Less: current portion		(13,305	)		(7,680	)

Long-term debt	$	571,955		$	465,638

Amended and Restated Senior Credit Facility

The Company entered into the senior secured credit facility, administered by Bank of America, N.A., on April 1, 2011 (“Senior Secured Credit Facility”). The Senior Secured Credit Facility initially included $135.0 million of term loans and a revolving line of credit of $30.0 million.

On March 1, 2012, the Company amended the Senior Secured Credit Facility to provide an incremental $25.0 million of term loans and increase the revolving line of credit by $45.0 million, from $30.0 million to $75.0 million. The Company used the incremental term loans of $25.0 million and a $5.0 million borrowing under the revolving line of credit to partially fund the acquisition of the Haven Facilities on March 1, 2012.

On December 31, 2012, the Company amended and restated the Senior Secured Credit Facility (“Amended and Restated Senior Credit Facility”), to provide a revolving line of credit of $100.0 million and term loans of $300.0 million, which resulted in debt proceeds of $151.1 million. The Company used $151.1 million of the term loans partially to fund the acquisition of BCA and AmiCare on December 31, 2012.

On March 11, 2013, the Company entered into a Consent and First Amendment (the “First Amendment”) to the Amended and Restated Senior Credit Facility. The First Amendment modified the definition of Consolidated EBITDA to permit the add-back for financial covenant purposes of certain fees and expenses related to the partial redemption of the Company’s 12.875% Senior Notes on March 12, 2013. In addition, the First Amendment amended the definitions of Consolidated Leverage Ratio and Consolidated Senior Leverage Ratio to permit the Company to test indebtedness on a basis net of cash and cash equivalents for financial covenant purposes.

On June 28, 2013, the Company entered into a Second Amendment (the “Second Amendment”) to the Amended and Restated Senior Credit Facility. The Second Amendment modified certain of the restrictive covenants contained therein to permit the Company to increase the amount of miscellaneous investments it may make, as well as to permit the Company to incur increased amounts of purchase money indebtedness in order to finance certain long-term capital leases.

On September 30, 2013, the Company entered into a Third Amendment (the “Third Amendment”) to the Amended and Restated Senior Credit Facility. The Third Amendment modified certain of the restrictive covenants contained therein to permit the incurrence by the Company of increased amounts of miscellaneous types of liens and indebtedness to facilitate its consummation of the acquisition of Longleaf.

The Company had $80.1 million of availability under the revolving line of credit as of September 30, 2013. Borrowings under the revolving line of credit are subject to customary conditions precedent to borrowing. The amended term loans require quarterly principal payments of $1.9 million for September 30, 2013 to December 31, 2013, $3.8 million for March 31, 2014 to December 31, 2014, $5.6 million for March 31, 2015 to December 31, 2015, $7.5 million for March 31, 2016 to December 31, 2016, and $9.4 million for March 31, 2017 to September 30, 2017, with the remaining principal balance due on the maturity date of December 31, 2017. The Amended and Restated Senior Credit Facility also provides for a $50.0 million incremental credit facility, subject to customary conditions precedent to borrowing.

Borrowings under the Amended and Restated Senior Credit Facility are guaranteed by each of the Company’s domestic subsidiaries (other than Park Royal) and are secured by a lien on substantially all of the assets of the Company and its domestic subsidiaries (other than Park Royal). Borrowings under the Amended and Restated Senior Credit Facility bear interest at a rate tied to the Company’s consolidated leverage ratio (defined as consolidated funded debt to consolidated EBITDA, in each case as defined in the Amended and Restated Senior Credit Facility). The Applicable Rate (as defined in the Amended and Restated Senior Credit Facility) for borrowings under the Amended and Restated Senior Credit Facility was 3.25% for Eurodollar Rate Loans (as defined in the Amended and Restated Senior Credit Facility) and 2.25% for Base Rate Loans (as defined in the Amended and Restated Senior Credit Facility) at September 30, 2013. Eurodollar Rate Loans bear interest at the Applicable Rate plus the Eurodollar Rate (as defined in the Amended and Restated Senior Credit Facility) (based upon the British Bankers Association LIBOR Rate (as defined in the Amended and Restated Senior Credit Facility) prior to commencement of the interest rate period). Base Rate Loans bear interest at the Applicable Rate plus the highest of (i) the federal funds rate plus 1/2 of 1.0%, (ii) the prime rate and (iii) the Eurodollar Rate plus 1.0%. As of September 30, 2013, borrowings under the Senior Secured Credit Facility bore interest at a rate of 3.25%. In addition, the Company is required to pay a commitment fee on undrawn amounts under the revolving line of credit. The Company paid a commitment fee of 0.5% for undrawn amounts for the period from December 31, 2012 through September 30, 2013.

The Amended and Restated Senior Credit Facility 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, 2013, the Company was in compliance with such covenants.

12.875% Senior Notes due 2018

On November 1, 2011, the Company issued $150.0 million of 12.875% Senior Notes due 2018 (the “12.875% Senior Notes”) at 98.323% of the aggregate principal amount of $150.0 million, a discount of $2.5 million. The notes bear interest at a rate of 12.875% per annum. The Company pays interest on the notes semi-annually, in arrears, on November 1 and May 1 of each year.

The indenture governing the 12.875% Senior Notes contains covenants that, among other things, limit the Company’s ability to: (i) incur or guarantee additional debt or issue certain preferred stock; (ii) pay dividends on the Company’s equity interests or redeem, repurchase or retire the Company’s equity interests or subordinated debt; (iii) transfer or sell assets; (iv) make certain investments; (v) incur certain liens; (vi) restrict the Company’s subsidiaries’ ability to pay dividends or make other payments to the Company; (vii) engage in certain transactions with the Company’s affiliates; and (viii) merge or consolidate with other companies or transfer all or substantially all of the Company’s assets.

The 12.875% Senior Notes issued by the Company are guaranteed by each of the Company’s domestic subsidiaries (other than Park Royal), all of which are wholly-owned subsidiaries. The guarantees are full and unconditional and joint and several and the Company, as the parent issuer of the 12.875% Senior Notes, has no independent assets or operations.

On March 12, 2013, the Company redeemed $52.5 million of the 12.875% Senior Notes using a portion of the net proceeds of its December 2012 equity offering pursuant to the provision in the indenture permitting an optional redemption with equity proceeds of up to 35% of the principal amount of 12.875% Senior Notes. The 12.875% Senior Notes were redeemed at a redemption price of 112.875% of the principal amount thereof plus accrued and unpaid interest to, but not including, the redemption date in accordance with the provisions of the indenture governing the 12.875% Senior Notes. As part of the redemption of 35% of the 12.875% Senior Notes, the Company recorded a debt extinguishment charge of $9.4 million, including the premium and write-off of deferred financing costs, which was recorded in debt extinguishment costs in the condensed consolidated statements of operations.

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, beginning on September 15, 2013.

The indenture governing the 6.125% Senior Notes contains 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 6.125% Senior Notes issued by the Company are guaranteed by each of the Company’s domestic subsidiaries (other than Park Royal), all of which are wholly-owned subsidiaries. The guarantees are full and unconditional and joint and several and the Company, as the parent issuer of the 6.125% Senior Notes, has no independent assets or operations.

The Company may redeem the 6.125% Senior Notes at its option, in whole or part, at any time prior to March 15, 2016, at a price equal to 100% of the principal amount of the 6.125% Senior Notes redeemed, plus accrued and unpaid interest to the redemption date and plus an applicable premium. The Company may redeem the 6.125% Senior Notes, in whole or in part, on or after March 15, 2016, at the redemption prices set forth in the indenture governing the 6.125% Senior Notes plus accrued and unpaid interest to the redemption date. At any time on or before March 15, 2016, the Company may elect to redeem up to 35% of the aggregate principal amount of the 6.125% Senior Notes at a redemption price equal to 106.125% of the principal amount thereof, plus accrued and unpaid interest to the redemption date, with the net proceeds of one or more equity offerings.

9.0% and 9.5% Revenue Bonds

On November 11, 2012, in connection with the acquisition of 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, 2013 and December 31, 2012, $2.2 million was recorded within other assets on the balance sheet 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	9 Months Ended
Equity	Sep. 30, 2013
Equity [Abstract]
Equity	8. Equity *Preferred Stock* The Company’s amended and restated certificate of incorporation provides that up to 10,000,000 shares of preferred stock may be issued. The Board of Directors has the authority to issue preferred stock in one or more series and to fix for each series the voting powers (full, limited or none), and the designations, preferences and relative participating, optional or other special rights and qualifications, limitations or restrictions on the stock and the number of shares constituting any series and the designations of this series, without any further vote or action by the stockholders. *Common Stock* The Company’s amended and restated certificate of incorporation provides that up to 90,000,000 shares of common stock may be issued. Holders of the Company’s common stock are entitled to one vote for each share held of record on all matters on which stockholders may vote. There are no preemptive, conversion, redemption or sinking fund provisions applicable to shares of the Company’s common stock. In the event of liquidation, dissolution or winding up, holders of the Company’s common stock are entitled to share ratably in the assets available for distribution, subject to any prior rights of any holders of preferred stock then outstanding. Delaware law prohibits the Company from paying any dividends unless it has capital surplus or net profits available for this purpose. In addition, the Amended and Restated Senior Credit Facility imposes restrictions on the Company’s ability to pay dividends. *Equity Offerings* On December 12, 2012, the Company completed the offering of 7,000,000 shares of common stock and on December 24, 2012, the Company completed the offering of 1,050,000 shares of common stock 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 $22.50 per share. The net proceeds to the Company from the sale of the shares, after deducting the underwriting discount of $7.3 million and additional offering-related expenses of $1.0 million, were $172.8 million. The Company used the net proceeds partially to fund the acquisitions of AmiCare and BCA on December 31, 2012 and to redeem $52.5 million of the Company’s 12.875% Senior Notes. On May 21, 2012, the Company completed the offering of 9,487,500 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 $15.50 per share. The net proceeds to the Company from the sale of the shares, after deducting the underwriting discount of $7.4 million and additional offering-related expenses of $0.7 million, were $139.0 million. The Company used the net offering proceeds to fund the acquisition of Timberline Knolls and acquisitions of certain facilities previously leased.

Equity-Based Compensation

9 Months Ended

Sep. 30, 2013

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Equity-Based Compensation

9. Equity-Based Compensation

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, 2013, a maximum of 4,700,000 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. 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 $1.3 million and $3.7 million in equity-based compensation expense for the three and nine months ended September 30, 2013, respectively, and $0.5 million and $1.7 million in equity-based compensation expense for the three and nine months ended September 30, 2012, respectively. On April 30, 2013, certain non-employee directors affiliated with Waud Capital Partners, L.L.C. resigned from the Company’s Board of Directors in connection with the Company’s efforts to comply with NASDAQ’s board independence requirements. The Company recorded incremental equity-based compensation expense of $0.6 million related to the vesting of 20,090 shares of restricted stock that would have been forfeited had the awards not been modified to accelerate vesting.

As of September 30, 2013, there was $15.3 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 1.6 years. The total intrinsic value of options exercised during the three and nine months ended September 30, 2013 was $0.1 million and $2.2 million, respectively.

As of September 30, 2013, there were 3,750 warrants outstanding and exercisable with a weighted average exercise price of $14.00. The weighted average grant date fair value of unvested restricted stock awards as of September 30, 2013 was $23.63. The Company recognized a deferred income tax benefit of $0.6 million and $1.5 million for the three and nine months ended September 30, 2013, respectively, related to equity-based compensation expense. The actual tax benefit realized from stock options exercised during the three and nine months ended September 30, 2013 was $0.1 million and $1.3 million, respectively. No tax benefits were recognized or realized during the three and nine months ended September 30, 2012.

Stock option activity during 2012 and 2013 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, 2012		346,821		$	7.74		4.50	$	947
Options granted		429,498			16.36		9.22		2,960
Options exercised		(124,194	)		8.01		N/A		N/A
Options cancelled		(97,028	)		14.70		N/A		N/A

Options outstanding at December 31, 2012		555,097			13.13		7.53		5,632
Options granted		387,800			29.80		9.37		1,031
Options exercised		(111,787	)		10.21		N/A		N/A
Options cancelled		(28,826	)		21.82		N/A		N/A

Options outstanding at September 30, 2013		802,284			21.07		8.23		9,210

Options exercisable at December 31, 2012		164,062		$	6.63		3.59	$	2,707

Options exercisable at September 30, 2013		131,210		$	9.38		4.30	$	3,345

Restricted stock activity during 2012 and 2013 was as follows:


	Number of Shares			Weighted Average Grant-Date Fair Value
Unvested at January 1, 2012		138,321		$	9.40
Granted		318,170			13.04
Cancelled		(42,107	)		14.25
Vested		(96,321	)		9.40

Unvested at December 31, 2012		318,063		$	15.73
Granted		266,845			30.28
Cancelled		(40,856	)		19.47
Vested		(75,247	)		16.08

Unvested at September 30, 2013		468,805		$	23.63

Restricted stock unit activity during 2012 and 2013 was as follows:


	Number of Shares			Weighted Average Grant-Date Fair Value
Unvested at January 1, 2012		—		$	—
Granted		86,485			16.11
Cancelled		(17,857	)		15.96
Vested		—			—

Unvested at December 31, 2012		68,628		$	16.11
Granted		72,876			29.39
Cancelled		—			—
Vested		(45,753	)		16.11

Unvested at September 30, 2013		95,751		$	23.05

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, 2013 and year ended December 31, 2012:


	September 30, 2013			December 31, 2012
Weighted average grant-date fair value of options	$	11.32		$	6.93
Risk-free interest rate		1.0	%		1.2	%
Expected volatility		40	%		42	%
Expected life (in years)		5.5			6.3

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 United States 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, 2013
Income Tax Disclosure [Abstract]
Income Taxes	10. Income Taxes The provision for income taxes for continuing operations for the three and nine months ended September 30, 2013 reflects effective tax rates of 34.7% and 37.4%, respectively. The provision for income taxes for continuing operations for the three and nine months ended September 30, 2012 reflects effective tax rates of 36.1% and 36.8%, respectively. The decrease in the tax rate for the three months ended September 30, 2013 is primarily attributable to the filing of the 2012 calendar year tax returns as well as certain state tax planning initiatives. The increase in the tax rate for the nine months ended September 30, 2013 is primarily attributable to the impact of additional state taxes associated with the Company’s expansions and acquisitions.

Fair Value Measurements

9 Months Ended

Sep. 30, 2013

Fair Value Disclosures [Abstract]

Fair Value Measurements

11. 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, 12.875% Senior Notes, 6.125% Senior Notes, 9.0% and 9.5% Revenue Bonds and contingent consideration liability as of September 30, 2013 and December 31, 2012 were as follows (in thousands):


	Carrying Amount				Fair Value
	September 30, 2013		December 31, 2012		September 30, 2013		December 31, 2012
Amended and Restated Senior Credit Facility	$	313,875	$	300,000	$	313,875	$	300,000
12.875% Senior Notes due 2018	$	96,171	$	147,757	$	117,731	$	181,500
6.125% Senior Notes due 2021	$	150,000	$	—	$	153,750	$	—
9.0% and 9.5% Revenue Bonds	$	25,214	$	25,561	$	25,214	$	25,561
Contingent consideration liability	$	6,500	$	6,120	$	6,500	$	6,120

The Company’s Amended and Restated Senior Credit Facility, 12.875% Senior Notes, 6.125% 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 value of the contingent consideration liability at September 30, 2013 was categorized as Level 3 in the GAAP fair value hierarchy. The contingent consideration liability was 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. Significant increases with respect to assumptions as to future earnings and probabilities of achieving such future earnings would result in higher fair value measurement while an increase in the discount rate would result in a lower fair value measurement. During the nine months ended September 30, 2013, the Company changed its projections of the timing of future payments. This change resulted in a $0.4 million increase in the fair value of the contingent consideration liability, which was recorded in transaction-related expenses in the condensed consolidated statements of operations.

Commitments and Contingencies	9 Months Ended
Commitments and Contingencies	Sep. 30, 2013
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	12. Commitments and Contingencies The Company is, from time to time, subject to various claims and legal actions that arise in the ordinary course of the Company’s business, including claims for damages for personal injuries, medical malpractice, 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.

Recently Issued Accounting Standards	9 Months Ended
Recently Issued Accounting Standards	Sep. 30, 2013
Accounting Changes And Error Corrections [Abstract]
Recently Issued Accounting Standards	13. Recently Issued Accounting Standards In July 2013, the Financial Accounting Standards Board issued Accounting Standards Update (“ASU”) 2013-11, “Income Taxes (Topic 740): Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists” (“ASU 2013-11”). ASU 2013-11 states an unrecognized tax benefit, or a portion of an unrecognized tax benefit, should be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward. ASU 2013-11 is effective for fiscal years, and interim periods within those years, beginning after December 15, 2013. Early adoption is permitted. Management does not expect ASU 2013-11 to have a significant impact on the Company’s consolidated financial statements.

Financial Information for the Company and Its Subsidiaries

9 Months Ended

Sep. 30, 2013

Text Block [Abstract]

Financial Information for the Company and Its Subsidiaries

14. Financial Information for the Company and Its Subsidiaries

The Company conducts substantially all of its business through its subsidiaries. Presented below is consolidating financial information for the Company and its subsidiaries as of September 30, 2013 and December 31, 2012, and for the three and nine months ended September 30, 2013 and 2012. The information segregates the parent company (Acadia Healthcare Company, Inc.), the combined wholly-owned subsidiary guarantors, the combined non-guarantor subsidiaries and eliminations. All of the subsidiary guarantees are full and unconditional and joint and several.

Acadia Healthcare Company, Inc.

Condensed Consolidating Balance Sheets

September 30, 2013

(In thousands)


	Parent			Combined Subsidiary Guarantors		Combined Subsidiary Non- Guarantors			Consolidating Adjustments			Total Consolidated Amounts
Current assets:
Cash and cash equivalents	$	—		$	—	$	5,350		$	(1,316	)	$	4,034
Accounts receivable, net		—			85,376		7,935			—			93,311
Deferred tax assets		—			12,705		314			—			13,019
Other current assets		—			31,504		1,012			—			32,516

Total current assets		—			129,585		14,611			(1,316	)		142,880
Property and equipment, net		—			299,219		30,516			—			329,735
Goodwill		—			549,721		97,289			—			647,010
Intangible assets, net		—			17,193		1,990			—			19,183
Investment in subsidiaries		983,456			—		—			(983,456	)		—
Other assets		14,158			7,699		2,321			—			24,178

Total assets	$	997,614		$	1,003,417	$	146,727		$	(984,772	)	$	1,162,986

Current liabilities:
Current portion of long-term debt	$	13,125		$	—	$	180		$	—		$	13,305
Accounts payable		—			26,573		1,192			(1,316	)		26,449
Accrued salaries and benefits		—			31,037		1,247			—			32,284
Other accrued liabilities		5,692			21,524		2,019			—			29,235

Total current liabilities		18,817			79,134		4,638			(1,316	)		101,273
Long-term debt		513,996			—		57,959			—			571,955
Deferred tax liabilities – noncurrent		(1,732	)		12,842		(6,131	)		—			4,979
Other liabilities		—			18,246		—			—			18,246

Total liabilities		531,081			110,222		56,466			(1,316	)		696,453

Total equity		466,533			893,195		90,261			(983,456	)		466,533

Total liabilities and equity	$	997,614		$	1,003,417	$	146,727		$	(984,772	)	$	1,162,986

Acadia Healthcare Company, Inc.

Condensed Consolidating Balance Sheets

December 31, 2012

(In thousands)


	Parent			Combined Subsidiary Guarantors		Combined Subsidiary Non- Guarantors			Consolidating Adjustments			Total Consolidated Amounts
Current assets:
Cash and cash equivalents	$	—		$	49,307	$	92		$	—		$	49,399
Accounts receivable, net		—			61,359		2,511			—			63,870
Deferred tax assets		—			11,323		57			—			11,380
Other current assets		—			16,074		258			—			16,332

Total current assets		—			138,063		2,918			—			140,981
Property and equipment, net		—			218,716		18,226			—			236,942
Goodwill		—			537,296		20,106			—			557,402
Intangible assets, net		—			14,953		1,035			—			15,988
Investment in subsidiaries		868,165			—		—			(868,165	)		—
Other assets		13,562			16,217		2,321			—			32,100

Total assets	$	881,727		$	925,245	$	44,606		$	(868,165	)	$	983,413

Current liabilities:
Current portion of long-term debt	$	7,500		$	—	$	180		$	—		$	7,680
Accounts payable		—			18,048		1,033			—			19,081
Accrued salaries and benefits		—			28,285		464			—			28,749
Other accrued liabilities		3,259			12,853		229			—			16,341

Total current liabilities		10,759			59,186		1,906						71,851
Long-term debt		440,257			—		25,381			—			465,638
Deferred tax liabilities – noncurrent		(1,839	)		3,793		(956	)		—			998
Other liabilities		—			12,376		—			—			12,376

Total liabilities		449,177			75,355		26,331			—			550,863

Total equity		432,550			849,890		18,275			(868,165	)		432,550

Total liabilities and equity	$	881,727		$	925,245	$	44,606		$	(868,165	)	$	983,413

Acadia Healthcare Company, Inc.

Condensed Consolidating Statement of Operations

Three Months Ended September 30, 2013

(In thousands)


	Parent			Combined Subsidiary Guarantors			Combined Subsidiary Non- Guarantors			Consolidating Adjustments			Total Consolidated Amounts
Revenue before provision for doubtful accounts	$	—		$	179,560		$	11,014		$	—		$	190,574
Provision for doubtful accounts		—			(5,660	)		(212	)		—			(5,872	)

Revenue		—			173,900			10,802			—			184,702
Salaries, wages and benefits		1,331			98,166			4,292			—			103,789
Professional fees		—			7,954			1,002			—			8,956
Supplies		—			9,170			636			—			9,806
Rents and leases		—			2,394			262			—			2,656
Other operating expenses		—			19,896			2,449			—			22,345
Depreciation and amortization		—			4,072			342			—			4,414
Interest expense, net		8,542			—			923			—			9,465
Transaction-related expenses		—			984			—			—			984

Total expenses		9,873			142,636			9,906			—			162,415
(Loss) income from continuing operations before income taxes		(9,873	)		31,264			896			—			22,287
Equity in earnings of subsidiaries		21,087			—			—			(21,087	)		—
(Benefit from) provision for income taxes		(3,150	)		10,680			211			—			7,741

Income (loss) from continuing operations		14,364			20,584			685			(21,087	)		14,546
Loss from discontinued operations, net of income taxes		—			(182	)		—			—			(182	)

Net income (loss)	$	14,364		$	20,402		$	685		$	(21,087	)	$	14,364

Acadia Healthcare Company, Inc.

Condensed Consolidating Statement of Operations

Three Months Ended September 30, 2012

(In thousands)


	Parent			Combined Subsidiary Guarantors			Combined Subsidiary Non- Guarantors		Consolidating Adjustments			Total Consolidated Amounts
Revenue before provision for doubtful accounts	$	—		$	104,618		$	—	$	—		$	104,618
Provision for doubtful accounts		—			(1,502	)		—		—			(1,502	)

Revenue		—			103,116			—		—			103,116
Salaries, wages and benefits		521			59,367			—		—			59,888
Professional fees		—			4,690			—		—			4,690
Supplies		—			4,831			—		—			4,831
Rents and leases		—			1,775			—		—			1,775
Other operating expenses		—			11,380			—		—			11,380
Depreciation and amortization		—			2,076			—		—			2,076
Interest expense, net		7,433			—			—		—			7,433
Transaction-related expenses		—			732			—		—			732

Total expenses		7,954			84,851			—		—			92,805
(Loss) income from continuing operations before income taxes		(7,954	)		18,265			—		—			10,311
Equity in earnings of subsidiaries		11,532			—			—		(11,532	)		—
(Benefit from) provision for income taxes		(2,872	)		6,595			—		—			3,723

Income (loss) from continuing operations		6,450			11,670			—		(11,532	)		6,588
Loss from discontinued operations, net of income taxes		—			(138	)		—		—			(138	)

Net income (loss)	$	6,450		$	11,532		$	—	$	(11,532	)	$	6,450

Acadia Healthcare Company, Inc.

Condensed Consolidating Statement of Operations

Nine Months Ended September 30, 2013

(In thousands)


	Parent			Combined Subsidiary Guarantors			Combined Subsidiary Non- Guarantors			Consolidating Adjustments			Total Consolidated Amounts
Revenue before provision for doubtful accounts	$	—		$	516,467		$	22,763		$	—		$	539,230
Provision for doubtful accounts		—			(14,932	)		(889	)		—			(15,821	)

Revenue		—			501,535			21,874			—			523,409
Salaries, wages and benefits		3,744			285,760			9,400			—			298,904
Professional fees		—			25,447			1,847			—			27,294
Supplies		—			26,718			1,299			—			28,017
Rents and leases		—			6,872			505			—			7,377
Other operating expenses		—			53,922			5,502			—			59,424
Depreciation and amortization		—			11,379			869			—			12,248
Interest expense, net		25,570			—			2,102			—			27,672
Debt extinguishment costs		9,350			—			—			—			9,350
Transaction-related expenses		—			3,813			—			—			3,813

Total expenses		38,664			413,911			21,524			—			474,099
(Loss) income from continuing operations before income taxes		(38,664	)		87,624			350			—			49,310
Equity in earnings of subsidiaries		54,340			—			—			(54,340	)		—
(Benefit from) provision for income taxes		(14,623	)		33,143			(81	)		—			18,439

Income (loss) from continuing operations		30,299			54,481			431			(54,340	)		30,871
Loss from discontinued operations, net of income taxes		—			(572	)		—			—			(572	)

Net income (loss)	$	30,299		$	53,909		$	431		$	(54,340	)	$	30,299

Acadia Healthcare Company, Inc.

Condensed Consolidating Statement of Operations

Nine Months Ended September 30, 2012

(In thousands)


	Parent			Combined Subsidiary Guarantors			Combined Subsidiary Non- Guarantors		Consolidating Adjustments			Total Consolidated Amounts
Revenue before provision for doubtful accounts	$	—		$	298,638		$	—	$	—		$	298,638
Provision for doubtful accounts		—			(5,429	)		—		—			(5,429	)

Revenue		—			293,209			—		—			293,209
Salaries, wages and benefits		1,691			171,899			—		—			173,590
Professional fees		—			13,521			—		—			13,521
Supplies		—			14,148			—		—			14,148
Rents and leases		—			6,244			—		—			6,244
Other operating expenses		—			30,768			—		—			30,768
Depreciation and amortization		—			5,332			—		—			5,332
Interest expense, net		22,186			—			—		—			22,186
Transaction-related expenses		—			2,097			—		—			2,097

Total expenses		23,877			244,009			—		—			267,886
(Loss) income from continuing operations before income taxes		(23,877	)		49,200			—		—			25,323
Equity in earnings of subsidiaries		31,139			—			—		(31,139	)		—
(Benefit from) provision for income taxes		(8,776	)		18,083			—		—			9,307

Income (loss) from continuing operations		16,038			31,117			—		(31,139	)		16,016
Income from discontinued operations, net of income taxes		—			22			—		—			22

Net income (loss)	$	16,038		$	31,139		$	—	$	(31,139	)	$	16,038

Acadia Healthcare Company, Inc.

Condensed Consolidating Statement of Cash Flows

Nine Months Ended September 30, 2013

(In thousands)


	Parent			Combined Subsidiary Guarantors			Combined Subsidiary Non- Guarantors			Consolidating Adjustments			Total Consolidated Amounts
Operating activities:
Net income (loss)	$	30,299		$	53,909		$	431		$	(54,340	)	$	30,299
Adjustments to reconcile net income (loss) to net cash provided by (used in) continuing operating activities:
Depreciation and amortization		—			11,379			869			—			12,248
Amortization of debt issuance costs		1,686			—			—			—			1,686
Equity-based compensation expense		3,744			—			—			—			3,744
Deferred income tax expense		(70	)		10,797			(182	)		—			10,545
Loss from discontinued operations, net of taxes		—			572			—			—			572
Debt extinguishment costs		9,350			—			—			—			9,350
Other		—			16			—			—			16
Change in operating assets and liabilities, net of effect of acquisitions:
Equity in earnings of subsidiaries		54,340			—			—			(54,340	)		—
Accounts receivable, net		—			(18,920	)		542			—			(18,378	)
Other current assets		—			(5,638	)		(19	)		—			(5,657	)
Other assets		—			(1,676	)		—			—			(1,676	)
Accounts payable and other accrued liabilities		—			2,763			(167	)		—			2,596
Accrued salaries and benefits		—			(3,660	)		193			—			(3,467	)
Other liabilities		—			7,693			(4,155	)		—			3,538

Net cash provided by (used in) continuing operating activities		99,349			57,235			(2,488	)		(108,680	)		45,416
Net cash used in discontinued operating activities		—			(541	)		—			—			(541	)

Net cash provided by (used in) operating activities		99,349			56,694			(2,488	)		(108,680	)		44,875
Investing activities:
Cash paid for acquisitions, net of cash acquired		—			(135,605	)		—			—			(135,605	)
Cash paid for capital expenditures		—			(50,378	)		(300	)		—			(50,678	)
Cash paid for real estate acquisitions		—			(4,676	)		—			—			(4,676	)
Other		—			(1,088	)		—			—			(1,088	)

Net cash used in investing activities		—			(191,747	)		(300	)		—			(192,047	)
Financing activities:
Borrowings on long-term debt		150,000			—			—			—			150,000
Net increase in revolving credit facility		19,500			—			—			—			19,500
Principal payments on long-term debt		(5,625	)		—			—			—			(5,625	)
Repayment of long-term debt		(52,500	)		—			—			—			(52,500	)
Payment of debt issuance costs		(4,307	)		—			—			—			(4,307	)
Payment of premium on note redemption		(6,759	)		—			—			—			(6,759	)
Proceeds from stock option exercises		233			—			—			—			233
Excess tax benefit from equity awards		1,265			—			—			—			1,265
Cash (used in) provided by intercompany activity		(201,156	)		85,746			8,046			107,364			—

Net cash (used in) provided by financing activities		(99,349	)		85,746			8,046			107,364			101,807

Net (decrease) increase in cash and cash equivalents		—			(49,307	)		5,258			(1,316	)		(45,365	)
Cash and cash equivalents at beginning of the period		—			49,307			92			—			49,399

Cash and cash equivalents at end of the period	$	—		$	—		$	5,350		$	(1,316	)	$	4,034

Acadia Healthcare Company, Inc.

Condensed Consolidating Statement of Cash Flows

Nine Months Ended September 30, 2012

(In thousands)


	Parent			Combined Subsidiary Guarantors			Combined Subsidiary Non- Guarantors		Consolidating Adjustments			Total Consolidated Amounts
Operating activities:
Net income (loss)	$	16,038		$	31,139		$	—	$	(31,139	)	$	16,038
Adjustments to reconcile net income (loss) to net cash provided by (used in) continuing operating activities:
Depreciation and amortization		—			5,332			—		—			5,332
Amortization of debt issuance costs		1,869			—			—		—			1,869
Equity-based compensation expense		1,691			—			—		—			1,691
Deferred income tax expense		(439	)		8,577			—		—			8,138
Loss from discontinued operations, net of taxes		—			(22	)		—		—			(22	)
Other		—			(9	)		—		—			(9	)
Change in operating assets and liabilities, net of effect of acquisitions:
Equity in earnings of subsidiaries		31,139			—			—		(31,139	)		—
Accounts receivable, net		—			(13,597	)		—		—			(13,597	)
Other current assets		—			(3,677	)		—		—			(3,677	)
Other assets		—			1,029			—		—			1,029
Accounts payable and other accrued liabilities		—			4,817			—		—			4,817
Accrued salaries and benefits		—			527			—		—			527
Other liabilities		—			1,527			—		—			1,527

Net cash provided by (used in) continuing operating activities		50,298			35,643			—		(62,278	)		23,663
Net cash used in discontinued operating activities		—			(328	)		—		—			(328	)

Net cash provided by (used in) operating activities		50,298			35,315			—		(62,278	)		23,335
Investing activities:
Cash paid for acquisitions, net of cash acquired		—			(165,981	)		—		—			(165,981	)
Cash paid for capital expenditures		—			(14,511	)		—		—			(14,511	)
Cash paid for real estate acquisitions		—			(50,745	)		—		—			(50,745	)
Other		—			1,231			—		—			1,231

Net cash used in investing activities		—			(230,006	)		—		—			(230,006	)
Financing activities:
Borrowings on long-term debt		25,000			—			—		—			25,000
Principal payments on long-term debt		(6,000	)		—			—		—			(6,000	)
Payment of debt issuance costs		(1,197	)		—			—		—			(1,197	)
Issuance of common stock		138,954			—			—		—			138,954
Proceeds from stock option exercises		515			—			—		—			515
Cash (used in) provided by intercompany activity		(207,570	)		145,292			—		62,278			—

Net cash (used in) provided by financing activities		(50,298	)		145,292			—		62,278			157,272

Net decrease in cash and cash equivalents		—			(49,399	)		—		—			(49,399	)
Cash and cash equivalents at beginning of the period		—			61,118			—		—			61,118

Cash and cash equivalents at end of the period	$	—		$	11,719		$	—	$	—		$	11,719

Description of Business and Basis of Presentation (Policies)	9 Months Ended
	Sep. 30, 2013
Accounting Policies [Abstract]
Description of Business	*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. At September 30, 2013, the Company operated 47 behavioral healthcare facilities with approximately 3,900 licensed beds in 21 states and Puerto Rico.
Basis of Presentation	*Basis of Presentation* The business of the Company is conducted through limited liability companies and C-corporations, each of which is a direct or indirect wholly-owned subsidiary of the Company. The Company’s consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries, all of which are 100% owned. All significant 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, 2012 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, 2012 included in the Company’s Annual Report on Form 10-K filed with the Securities and Exchange Commission on March 1, 2013. 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.
Income Taxes	In July 2013, the Financial Accounting Standards Board issued Accounting Standards Update (“ASU”) 2013-11, “Income Taxes (Topic 740): Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists” (“ASU 2013-11”). ASU 2013-11 states an unrecognized tax benefit, or a portion of an unrecognized tax benefit, should be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward. ASU 2013-11 is effective for fiscal years, and interim periods within those years, beginning after December 15, 2013. Early adoption is permitted. Management does not expect ASU 2013-11 to have a significant impact on the Company’s consolidated financial statements.

Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2013

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, 2013 and 2012 (in thousands except per share amounts):


	Three Months Ended September 30,						Nine Months Ended September 30,
	2013			2012			2013			2012
Numerator:
Basic and diluted earnings per share:
Income from continuing operations	$	14,546		$	6,588		$	30,871		$	16,016
(Loss) income from discontinued operations		(182	)		(138	)		(572	)		22

Net income	$	14,364		$	6,450		$	30,299		$	16,038

Denominator:
Weighted average shares outstanding for basic earnings per share		50,040			41,757			49,987			36,795
Effects of dilutive instruments		303			234			226			211

Shares used in computing diluted earnings per common share		50,343			41,991			50,213			37,006

Basic earnings per share:
Income from continuing operations	$	0.29		$	0.16		$	0.62		$	0.44
Loss from discontinued operations		—			(0.01	)		(0.01	)		—

Net income	$	0.29		$	0.15		$	0.61		$	0.44

Diluted earnings per share:
Income from continuing operations	$	0.29		$	0.16		$	0.61		$	0.43
Loss from discontinued operations		—			(0.01	)		(0.01	)		—

Net income	$	0.29		$	0.15		$	0.60		$	0.43

Acquisitions (Tables)

9 Months Ended

Sep. 30, 2013

Business Combinations [Abstract]

Preliminary Fair Values of Assets Acquired and Liabilities Assumed at Corresponding Acquisition Date

The preliminary fair values of assets acquired and liabilities assumed during the nine months ended September 30, 2013 were as follows (in thousands):


	UMC Facilities		Other		Total
Cash	$	52	$	883	$	935
Accounts receivable		5,251		6,120		11,371
Prepaid expenses and other current assets		557		3,189		3,746
Property and equipment		22,732		28,088		50,820
Goodwill		67,544		22,592		90,136
Intangible assets		1,505		1,406		2,911
Other assets		4,563		159		4,722

Total assets acquired		102,204		62,437		164,641
Accounts payable		1,535		7,290		8,825
Accrued salaries and benefits		588		2,594		3,182
Other accrued expenses		609		1,195		1,804
Other liabilities		53		2,553		2,606

Total liabilities assumed		2,785		13,632		16,417

Net assets acquired	$	99,419	$	48,805	$	148,224


	BCA		AmiCare		Park Royal		Timberline Knolls		Haven Facilities		Total
Cash	$	5	$	1,596	$	42	$	—	$	5	$	1,648
Accounts receivable		6,980		3,684		1,450		2,845		4,138		19,097
Prepaid expenses and other current assets		1,291		1,509		1,258		170		803		5,031
Property and equipment		23,561		23,150		18,291		590		12,723		78,315
Goodwill		116,609		86,491		19,320		72,164		74,435		369,019
Intangible assets		1,161		1,267		1,035		3,317		1,200		7,980
Other assets		326		—		3,141		—		—		3,467

Total assets acquired		149,933		117,697		44,537		79,086		93,304		484,557
Accounts payable		3,602		504		695		2,011		1,183		7,995
Accrued salaries and benefits		2,207		2,508		443		653		1,523		7,334
Other accrued expenses		697		627		1,079		869		127		3,399
Debt		—		—		25,600		—		—		25,600
Other liabilities		475		1,495		—		—		—		1,970

Total liabilities assumed		6,981		5,134		27,817		3,533		2,833		46,298

Net assets acquired	$	142,952	$	112,563	$	16,720	$	75,553	$	90,471	$	438,259

Transaction-related expenses were comprised of the following costs for the three and nine months ended September 30, 2013 and 2012 (in thousands):


	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
Legal, accounting and other fees	$	841	$	629	$	2,644	$	1,958
Severance and contract termination costs		143		103		1,169		139

	$	984	$	732	$	3,813	$	2,097

Pro Forma Financial Information for Acquisitions Occurred

The following table provides certain pro forma financial information for the Company as if the acquisitions completed in 2013 and 2012 occurred as of January 1, 2012 (in thousands):


	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
Revenue	$	184,702	$	145,565	$	531,394	$	433,956

Income from continuing operations, before income taxes	$	22,287	$	15,279	$	50,643	$	43,871

Goodwill and Other Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2013

Goodwill And Intangible Assets Disclosure [Abstract]

Summary of Changes in Goodwill

The following table summarizes changes in goodwill during the nine months ended September 30, 2013 (in thousands):


Balance at January 1, 2013	$	557,402
Increase from 2013 acquisitions		90,136
Other		(528	)

Balance at September 30, 2013	$	647,010

Other Identifiable Intangible Assets and Related Accumulated Amortization

Other identifiable intangible assets and related accumulated amortization consists of the following as of September 30, 2013 and December 31, 2012 (in thousands):


	Gross Carrying Amount				Accumulated Amortization
	September 30, 2013		December 31, 2012		September 30, 2013			December 31, 2012
Intangible assets subject to amortization:
Contract intangible assets	$	2,100	$	2,100	$	(805	)	$	(490	)
Non-compete agreements		1,247		1,247		(964	)		(684	)

		3,347		3,347		(1,769	)		(1,174	)
Intangible assets not subject to amortization:
Licenses and accreditations		7,711		6,969		—			—
Trade names		3,000		3,000		—			—
Certificates of need		6,894		3,846		—			—

		17,605		13,815		—			—

Total	$	20,952	$	17,162	$	(1,769	)	$	(1,174	)

Property and Equipment (Tables)

9 Months Ended

Sep. 30, 2013

Property Plant And Equipment [Abstract]

Summary of Property and Equipment

Property and equipment consists of the following as of September 30, 2013 and December 31, 2012 (in thousands):


	September 30, 2013			December 31, 2012
Land	$	50,312		$	39,130
Building and improvements		227,205			171,769
Equipment		33,715			19,773
Construction in progress		43,395			19,300

		354,627			249,972
Less accumulated depreciation		(24,892	)		(13,030	)

Property and equipment, net	$	329,735		$	236,942

Discontinued Operations (Tables)

9 Months Ended

Sep. 30, 2013

Discontinued Operations And Disposal Groups [Abstract]

Summary of Results from Discontinued Operations

A summary of results from discontinued operations is as follows (in thousands):


	Three Months Ended September 30,						Nine Months Ended September 30,
	2013			2012			2013			2012
Revenue	$	(264	)	$	—		$	(363	)	$	3,570

(Loss) income from discontinued operations, net of income taxes	$	(182	)	$	(138	)	$	(572	)	$	22

Long-Term Debt (Tables)

9 Months Ended

Sep. 30, 2013

Debt Disclosure [Abstract]

Components of Long Term Debt

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


	September 30, 2013			December 31, 2012
Amended and Restated Senior Credit Facility:
Senior Secured Term Loans	$	294,375		$	300,000
Senior Secured Revolving Line of Credit		19,500			—
12.875% Senior Notes due 2018		96,171			147,757
6.125% Senior Notes due 2021		150,000			—
9.0% and 9.5% Revenue Bonds		25,214			25,561

		585,260			473,318
Less: current portion		(13,305	)		(7,680	)

Long-term debt	$	571,955		$	465,638

Equity-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2013

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock Option Activity

Stock option activity during 2012 and 2013 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, 2012		346,821		$	7.74		4.50	$	947
Options granted		429,498			16.36		9.22		2,960
Options exercised		(124,194	)		8.01		N/A		N/A
Options cancelled		(97,028	)		14.70		N/A		N/A

Options outstanding at December 31, 2012		555,097			13.13		7.53		5,632
Options granted		387,800			29.80		9.37		1,031
Options exercised		(111,787	)		10.21		N/A		N/A
Options cancelled		(28,826	)		21.82		N/A		N/A

Options outstanding at September 30, 2013		802,284			21.07		8.23		9,210

Options exercisable at December 31, 2012		164,062		$	6.63		3.59	$	2,707

Options exercisable at September 30, 2013		131,210		$	9.38		4.30	$	3,345

Restricted Stock Activity

Restricted stock activity during 2012 and 2013 was as follows:


	Number of Shares			Weighted Average Grant-Date Fair Value
Unvested at January 1, 2012		138,321		$	9.40
Granted		318,170			13.04
Cancelled		(42,107	)		14.25
Vested		(96,321	)		9.40

Unvested at December 31, 2012		318,063		$	15.73
Granted		266,845			30.28
Cancelled		(40,856	)		19.47
Vested		(75,247	)		16.08

Unvested at September 30, 2013		468,805		$	23.63

Restricted Stock Unit Activity

Restricted stock unit activity during 2012 and 2013 was as follows:


	Number of Shares			Weighted Average Grant-Date Fair Value
Unvested at January 1, 2012		—		$	—
Granted		86,485			16.11
Cancelled		(17,857	)		15.96
Vested		—			—

Unvested at December 31, 2012		68,628		$	16.11
Granted		72,876			29.39
Cancelled		—			—
Vested		(45,753	)		16.11

Unvested at September 30, 2013		95,751		$	23.05

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, 2013 and year ended December 31, 2012:


	September 30, 2013			December 31, 2012
Weighted average grant-date fair value of options	$	11.32		$	6.93
Risk-free interest rate		1.0	%		1.2	%
Expected volatility		40	%		42	%
Expected life (in years)		5.5			6.3

Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2013

Fair Value Disclosures [Abstract]

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


	Carrying Amount				Fair Value
	September 30, 2013		December 31, 2012		September 30, 2013		December 31, 2012
Amended and Restated Senior Credit Facility	$	313,875	$	300,000	$	313,875	$	300,000
12.875% Senior Notes due 2018	$	96,171	$	147,757	$	117,731	$	181,500
6.125% Senior Notes due 2021	$	150,000	$	—	$	153,750	$	—
9.0% and 9.5% Revenue Bonds	$	25,214	$	25,561	$	25,214	$	25,561
Contingent consideration liability	$	6,500	$	6,120	$	6,500	$	6,120

Financial Information for the Company and Its Subsidiaries (Tables)

9 Months Ended

Sep. 30, 2013

Text Block [Abstract]

Summary of Condensed Consolidating Balance Sheets

Acadia Healthcare Company, Inc.

Condensed Consolidating Balance Sheets

September 30, 2013

(In thousands)


	Parent			Combined Subsidiary Guarantors		Combined Subsidiary Non- Guarantors			Consolidating Adjustments			Total Consolidated Amounts
Current assets:
Cash and cash equivalents	$	—		$	—	$	5,350		$	(1,316	)	$	4,034
Accounts receivable, net		—			85,376		7,935			—			93,311
Deferred tax assets		—			12,705		314			—			13,019
Other current assets		—			31,504		1,012			—			32,516

Total current assets		—			129,585		14,611			(1,316	)		142,880
Property and equipment, net		—			299,219		30,516			—			329,735
Goodwill		—			549,721		97,289			—			647,010
Intangible assets, net		—			17,193		1,990			—			19,183
Investment in subsidiaries		983,456			—		—			(983,456	)		—
Other assets		14,158			7,699		2,321			—			24,178

Total assets	$	997,614		$	1,003,417	$	146,727		$	(984,772	)	$	1,162,986

Current liabilities:
Current portion of long-term debt	$	13,125		$	—	$	180		$	—		$	13,305
Accounts payable		—			26,573		1,192			(1,316	)		26,449
Accrued salaries and benefits		—			31,037		1,247			—			32,284
Other accrued liabilities		5,692			21,524		2,019			—			29,235

Total current liabilities		18,817			79,134		4,638			(1,316	)		101,273
Long-term debt		513,996			—		57,959			—			571,955
Deferred tax liabilities – noncurrent		(1,732	)		12,842		(6,131	)		—			4,979
Other liabilities		—			18,246		—			—			18,246

Total liabilities		531,081			110,222		56,466			(1,316	)		696,453

Total equity		466,533			893,195		90,261			(983,456	)		466,533

Total liabilities and equity	$	997,614		$	1,003,417	$	146,727		$	(984,772	)	$	1,162,986

Acadia Healthcare Company, Inc.

Condensed Consolidating Balance Sheets

December 31, 2012

(In thousands)


	Parent			Combined Subsidiary Guarantors		Combined Subsidiary Non- Guarantors			Consolidating Adjustments			Total Consolidated Amounts
Current assets:
Cash and cash equivalents	$	—		$	49,307	$	92		$	—		$	49,399
Accounts receivable, net		—			61,359		2,511			—			63,870
Deferred tax assets		—			11,323		57			—			11,380
Other current assets		—			16,074		258			—			16,332

Total current assets		—			138,063		2,918			—			140,981
Property and equipment, net		—			218,716		18,226			—			236,942
Goodwill		—			537,296		20,106			—			557,402
Intangible assets, net		—			14,953		1,035			—			15,988
Investment in subsidiaries		868,165			—		—			(868,165	)		—
Other assets		13,562			16,217		2,321			—			32,100

Total assets	$	881,727		$	925,245	$	44,606		$	(868,165	)	$	983,413

Current liabilities:
Current portion of long-term debt	$	7,500		$	—	$	180		$	—		$	7,680
Accounts payable		—			18,048		1,033			—			19,081
Accrued salaries and benefits		—			28,285		464			—			28,749
Other accrued liabilities		3,259			12,853		229			—			16,341

Total current liabilities		10,759			59,186		1,906						71,851
Long-term debt		440,257			—		25,381			—			465,638
Deferred tax liabilities – noncurrent		(1,839	)		3,793		(956	)		—			998
Other liabilities		—			12,376		—			—			12,376

Total liabilities		449,177			75,355		26,331			—			550,863

Total equity		432,550			849,890		18,275			(868,165	)		432,550

Total liabilities and equity	$	881,727		$	925,245	$	44,606		$	(868,165	)	$	983,413

Summary of Condensed Consolidating Statement of Operations

Acadia Healthcare Company, Inc.

Condensed Consolidating Statement of Operations

Three Months Ended September 30, 2013

(In thousands)


	Parent			Combined Subsidiary Guarantors			Combined Subsidiary Non- Guarantors			Consolidating Adjustments			Total Consolidated Amounts
Revenue before provision for doubtful accounts	$	—		$	179,560		$	11,014		$	—		$	190,574
Provision for doubtful accounts		—			(5,660	)		(212	)		—			(5,872	)

Revenue		—			173,900			10,802			—			184,702
Salaries, wages and benefits		1,331			98,166			4,292			—			103,789
Professional fees		—			7,954			1,002			—			8,956
Supplies		—			9,170			636			—			9,806
Rents and leases		—			2,394			262			—			2,656
Other operating expenses		—			19,896			2,449			—			22,345
Depreciation and amortization		—			4,072			342			—			4,414
Interest expense, net		8,542			—			923			—			9,465
Transaction-related expenses		—			984			—			—			984

Total expenses		9,873			142,636			9,906			—			162,415
(Loss) income from continuing operations before income taxes		(9,873	)		31,264			896			—			22,287
Equity in earnings of subsidiaries		21,087			—			—			(21,087	)		—
(Benefit from) provision for income taxes		(3,150	)		10,680			211			—			7,741

Income (loss) from continuing operations		14,364			20,584			685			(21,087	)		14,546
Loss from discontinued operations, net of income taxes		—			(182	)		—			—			(182	)

Net income (loss)	$	14,364		$	20,402		$	685		$	(21,087	)	$	14,364

Acadia Healthcare Company, Inc.

Condensed Consolidating Statement of Operations

Three Months Ended September 30, 2012

(In thousands)


	Parent			Combined Subsidiary Guarantors			Combined Subsidiary Non- Guarantors		Consolidating Adjustments			Total Consolidated Amounts
Revenue before provision for doubtful accounts	$	—		$	104,618		$	—	$	—		$	104,618
Provision for doubtful accounts		—			(1,502	)		—		—			(1,502	)

Revenue		—			103,116			—		—			103,116
Salaries, wages and benefits		521			59,367			—		—			59,888
Professional fees		—			4,690			—		—			4,690
Supplies		—			4,831			—		—			4,831
Rents and leases		—			1,775			—		—			1,775
Other operating expenses		—			11,380			—		—			11,380
Depreciation and amortization		—			2,076			—		—			2,076
Interest expense, net		7,433			—			—		—			7,433
Transaction-related expenses		—			732			—		—			732

Total expenses		7,954			84,851			—		—			92,805
(Loss) income from continuing operations before income taxes		(7,954	)		18,265			—		—			10,311
Equity in earnings of subsidiaries		11,532			—			—		(11,532	)		—
(Benefit from) provision for income taxes		(2,872	)		6,595			—		—			3,723

Income (loss) from continuing operations		6,450			11,670			—		(11,532	)		6,588
Loss from discontinued operations, net of income taxes		—			(138	)		—		—			(138	)

Net income (loss)	$	6,450		$	11,532		$	—	$	(11,532	)	$	6,450

Acadia Healthcare Company, Inc.

Condensed Consolidating Statement of Operations

Nine Months Ended September 30, 2013

(In thousands)


	Parent			Combined Subsidiary Guarantors			Combined Subsidiary Non- Guarantors			Consolidating Adjustments			Total Consolidated Amounts
Revenue before provision for doubtful accounts	$	—		$	516,467		$	22,763		$	—		$	539,230
Provision for doubtful accounts		—			(14,932	)		(889	)		—			(15,821	)

Revenue		—			501,535			21,874			—			523,409
Salaries, wages and benefits		3,744			285,760			9,400			—			298,904
Professional fees		—			25,447			1,847			—			27,294
Supplies		—			26,718			1,299			—			28,017
Rents and leases		—			6,872			505			—			7,377
Other operating expenses		—			53,922			5,502			—			59,424
Depreciation and amortization		—			11,379			869			—			12,248
Interest expense, net		25,570			—			2,102			—			27,672
Debt extinguishment costs		9,350			—			—			—			9,350
Transaction-related expenses		—			3,813			—			—			3,813

Total expenses		38,664			413,911			21,524			—			474,099
(Loss) income from continuing operations before income taxes		(38,664	)		87,624			350			—			49,310
Equity in earnings of subsidiaries		54,340			—			—			(54,340	)		—
(Benefit from) provision for income taxes		(14,623	)		33,143			(81	)		—			18,439

Income (loss) from continuing operations		30,299			54,481			431			(54,340	)		30,871
Loss from discontinued operations, net of income taxes		—			(572	)		—			—			(572	)

Net income (loss)	$	30,299		$	53,909		$	431		$	(54,340	)	$	30,299

Acadia Healthcare Company, Inc.

Condensed Consolidating Statement of Operations

Nine Months Ended September 30, 2012

(In thousands)


	Parent			Combined Subsidiary Guarantors			Combined Subsidiary Non- Guarantors		Consolidating Adjustments			Total Consolidated Amounts
Revenue before provision for doubtful accounts	$	—		$	298,638		$	—	$	—		$	298,638
Provision for doubtful accounts		—			(5,429	)		—		—			(5,429	)

Revenue		—			293,209			—		—			293,209
Salaries, wages and benefits		1,691			171,899			—		—			173,590
Professional fees		—			13,521			—		—			13,521
Supplies		—			14,148			—		—			14,148
Rents and leases		—			6,244			—		—			6,244
Other operating expenses		—			30,768			—		—			30,768
Depreciation and amortization		—			5,332			—		—			5,332
Interest expense, net		22,186			—			—		—			22,186
Transaction-related expenses		—			2,097			—		—			2,097

Total expenses		23,877			244,009			—		—			267,886
(Loss) income from continuing operations before income taxes		(23,877	)		49,200			—		—			25,323
Equity in earnings of subsidiaries		31,139			—			—		(31,139	)		—
(Benefit from) provision for income taxes		(8,776	)		18,083			—		—			9,307

Income (loss) from continuing operations		16,038			31,117			—		(31,139	)		16,016
Income from discontinued operations, net of income taxes		—			22			—		—			22

Net income (loss)	$	16,038		$	31,139		$	—	$	(31,139	)	$	16,038

Summary of Condensed Consolidating Statement of Cash Flows

Acadia Healthcare Company, Inc.

Condensed Consolidating Statement of Cash Flows

Nine Months Ended September 30, 2013

(In thousands)


	Parent			Combined Subsidiary Guarantors			Combined Subsidiary Non- Guarantors			Consolidating Adjustments			Total Consolidated Amounts
Operating activities:
Net income (loss)	$	30,299		$	53,909		$	431		$	(54,340	)	$	30,299
Adjustments to reconcile net income (loss) to net cash provided by (used in) continuing operating activities:
Depreciation and amortization		—			11,379			869			—			12,248
Amortization of debt issuance costs		1,686			—			—			—			1,686
Equity-based compensation expense		3,744			—			—			—			3,744
Deferred income tax expense		(70	)		10,797			(182	)		—			10,545
Loss from discontinued operations, net of taxes		—			572			—			—			572
Debt extinguishment costs		9,350			—			—			—			9,350
Other		—			16			—			—			16
Change in operating assets and liabilities, net of effect of acquisitions:
Equity in earnings of subsidiaries		54,340			—			—			(54,340	)		—
Accounts receivable, net		—			(18,920	)		542			—			(18,378	)
Other current assets		—			(5,638	)		(19	)		—			(5,657	)
Other assets		—			(1,676	)		—			—			(1,676	)
Accounts payable and other accrued liabilities		—			2,763			(167	)		—			2,596
Accrued salaries and benefits		—			(3,660	)		193			—			(3,467	)
Other liabilities		—			7,693			(4,155	)		—			3,538

Net cash provided by (used in) continuing operating activities		99,349			57,235			(2,488	)		(108,680	)		45,416
Net cash used in discontinued operating activities		—			(541	)		—			—			(541	)

Net cash provided by (used in) operating activities		99,349			56,694			(2,488	)		(108,680	)		44,875
Investing activities:
Cash paid for acquisitions, net of cash acquired		—			(135,605	)		—			—			(135,605	)
Cash paid for capital expenditures		—			(50,378	)		(300	)		—			(50,678	)
Cash paid for real estate acquisitions		—			(4,676	)		—			—			(4,676	)
Other		—			(1,088	)		—			—			(1,088	)

Net cash used in investing activities		—			(191,747	)		(300	)		—			(192,047	)
Financing activities:
Borrowings on long-term debt		150,000			—			—			—			150,000
Net increase in revolving credit facility		19,500			—			—			—			19,500
Principal payments on long-term debt		(5,625	)		—			—			—			(5,625	)
Repayment of long-term debt		(52,500	)		—			—			—			(52,500	)
Payment of debt issuance costs		(4,307	)		—			—			—			(4,307	)
Payment of premium on note redemption		(6,759	)		—			—			—			(6,759	)
Proceeds from stock option exercises		233			—			—			—			233
Excess tax benefit from equity awards		1,265			—			—			—			1,265
Cash (used in) provided by intercompany activity		(201,156	)		85,746			8,046			107,364			—

Net cash (used in) provided by financing activities		(99,349	)		85,746			8,046			107,364			101,807

Net (decrease) increase in cash and cash equivalents		—			(49,307	)		5,258			(1,316	)		(45,365	)
Cash and cash equivalents at beginning of the period		—			49,307			92			—			49,399

Cash and cash equivalents at end of the period	$	—		$	—		$	5,350		$	(1,316	)	$	4,034

Acadia Healthcare Company, Inc.

Condensed Consolidating Statement of Cash Flows

Nine Months Ended September 30, 2012

(In thousands)


	Parent			Combined Subsidiary Guarantors			Combined Subsidiary Non- Guarantors		Consolidating Adjustments			Total Consolidated Amounts
Operating activities:
Net income (loss)	$	16,038		$	31,139		$	—	$	(31,139	)	$	16,038
Adjustments to reconcile net income (loss) to net cash provided by (used in) continuing operating activities:
Depreciation and amortization		—			5,332			—		—			5,332
Amortization of debt issuance costs		1,869			—			—		—			1,869
Equity-based compensation expense		1,691			—			—		—			1,691
Deferred income tax expense		(439	)		8,577			—		—			8,138
Loss from discontinued operations, net of taxes		—			(22	)		—		—			(22	)
Other		—			(9	)		—		—			(9	)
Change in operating assets and liabilities, net of effect of acquisitions:
Equity in earnings of subsidiaries		31,139			—			—		(31,139	)		—
Accounts receivable, net		—			(13,597	)		—		—			(13,597	)
Other current assets		—			(3,677	)		—		—			(3,677	)
Other assets		—			1,029			—		—			1,029
Accounts payable and other accrued liabilities		—			4,817			—		—			4,817
Accrued salaries and benefits		—			527			—		—			527
Other liabilities		—			1,527			—		—			1,527

Net cash provided by (used in) continuing operating activities		50,298			35,643			—		(62,278	)		23,663
Net cash used in discontinued operating activities		—			(328	)		—		—			(328	)

Net cash provided by (used in) operating activities		50,298			35,315			—		(62,278	)		23,335
Investing activities:
Cash paid for acquisitions, net of cash acquired		—			(165,981	)		—		—			(165,981	)
Cash paid for capital expenditures		—			(14,511	)		—		—			(14,511	)
Cash paid for real estate acquisitions		—			(50,745	)		—		—			(50,745	)
Other		—			1,231			—		—			1,231

Net cash used in investing activities		—			(230,006	)		—		—			(230,006	)
Financing activities:
Borrowings on long-term debt		25,000			—			—		—			25,000
Principal payments on long-term debt		(6,000	)		—			—		—			(6,000	)
Payment of debt issuance costs		(1,197	)		—			—		—			(1,197	)
Issuance of common stock		138,954			—			—		—			138,954
Proceeds from stock option exercises		515			—			—		—			515
Cash (used in) provided by intercompany activity		(207,570	)		145,292			—		62,278			—

Net cash (used in) provided by financing activities		(50,298	)		145,292			—		62,278			157,272

Net decrease in cash and cash equivalents		—			(49,399	)		—		—			(49,399	)
Cash and cash equivalents at beginning of the period		—			61,118			—		—			61,118

Cash and cash equivalents at end of the period	$	—		$	11,719		$	—	$	—		$	11,719

Description of Business and Basis of Presentation - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2013 Facility State Beds
Accounting Policies [Abstract]
Number of inpatient psychiatric facilities	47
Number of inpatient psychiatric beds	3,900
Number of states covered under inpatient psychiatric facilities	21
Percentage of ownership in subsidiaries	100.00%

Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Earnings Per Share [Abstract]
Income from continuing operations	$ 14,546	$ 6,588	$ 30,871	$ 16,016
(Loss) income from discontinued operations	(182)	(138)	(572)	22
Net income	$ 14,364	$ 6,450	$ 30,299	$ 16,038
Weighted average shares outstanding for basic earnings per share	50,040	41,757	49,987	36,795
Effects of dilutive instruments	303	234	226	211
Shares used in computing diluted earnings per common share	50,343	41,991	50,213	37,006
Income from continuing operations	$ 0.29	$ 0.16	$ 0.62	$ 0.44
Loss from discontinued operations		$ (0.01)	$ (0.01)
Net income	$ 0.29	$ 0.15	$ 0.61	$ 0.44
Income from continuing operations	$ 0.29	$ 0.16	$ 0.61	$ 0.43
Loss from discontinued operations		$ (0.01)	$ (0.01)
Net income	$ 0.29	$ 0.15	$ 0.60	$ 0.43

Earnings Per Share - Additional Information (Detail) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Earnings Per Share [Abstract]
Excluded common stock for computation of diluted earnings per share	0.4	0.4	0.7	0.4

Acquisitions - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		1 Months Ended				9 Months Ended		0 Months Ended	9 Months Ended			1 Months Ended
Acquisitions - Additional Information (Detail) (USD $)	Sep. 30, 2013 Beds	Sep. 30, 2012	Sep. 30, 2013 Beds	Sep. 30, 2012	Sep. 30, 2013 Pro Forma Information [Member]	Sep. 30, 2012 Pro Forma Information [Member]	Sep. 30, 2013 Pro Forma Information [Member]	Sep. 30, 2012 Pro Forma Information [Member]	Aug. 01, 2013 The Refuge [Member] Beds	May 01, 2013 UMC Facilities [Member] Beds Facility	Jan. 31, 2013 Delta Medical Center [Member] Beds	Dec. 31, 2012 Greenleaf Center [Member] Beds	Sep. 30, 2013 BCA [Member]	Sep. 30, 2013 AmiCare [Member]	Nov. 11, 2012 Park Royal [Member]	Sep. 30, 2013 Park Royal [Member]	Sep. 30, 2013 Timberline Knolls [Member]	Sep. 30, 2013 Haven Facilities [Member] Hospital	Oct. 01, 2013 Longleaf Hospital [Member] Subsequent Event [Member] Beds
Business Acquisition [Line Items]
Number of acute inpatient psychiatric beds	3,900		3,900						87	108	243	50							68
Cash consideration of acquired entity									$ 14,100,000	$ 99,400,000	$ 23,100,000	$ 6,300,000							$ 8,500,000
Number of facilities acquired										2
Number of inpatient psychiatric additional beds										100
Number of inpatient psychiatric beds in acquired facilities										75
Acquisition completion date													Dec. 31, 2012	Dec. 31, 2012		Nov. 11, 2012	Aug. 31, 2012	Mar. 01, 2012
Acquired membership interest rate in park royal															100.00%
Number of hospitals acquired																		3
Revenue	185,752,000	163,935,000	542,637,000	489,612,000	87,700,000	14,200,000	234,600,000	29,200,000
Income from continuing operations before income taxes	$ 22,357,000	$ 13,553,000	$ 50,888,000	$ 39,082,000	$ 11,100,000	$ 2,800,000	$ 26,000,000	$ 5,500,000

Acquisitions - Preliminary Fair Values of Assets Acquired and Liabilities Assumed at Corresponding Acquisition Date (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Business Acquisition [Line Items]
Goodwill	$ 647,010	$ 557,402
2013 Acquisitions [Member]
Business Acquisition [Line Items]
Cash	935
Accounts receivable	11,371
Prepaid expenses and other current assets	3,746
Property and equipment	50,820
Goodwill	90,136
Intangible assets	2,911
Other assets	4,722
Total assets acquired	164,641
Accounts payable	8,825
Accrued salaries and benefits	3,182
Other accrued expenses	1,804
Other liabilities	2,606
Total liabilities assumed	16,417
Net assets acquired	148,224
2013 Acquisitions [Member] \| UMC Facilities [Member]
Business Acquisition [Line Items]
Cash	52
Accounts receivable	5,251
Prepaid expenses and other current assets	557
Property and equipment	22,732
Goodwill	67,544
Intangible assets	1,505
Other assets	4,563
Total assets acquired	102,204
Accounts payable	1,535
Accrued salaries and benefits	588
Other accrued expenses	609
Other liabilities	53
Total liabilities assumed	2,785
Net assets acquired	99,419
2013 Acquisitions [Member] \| Other [Member]
Business Acquisition [Line Items]
Cash	883
Accounts receivable	6,120
Prepaid expenses and other current assets	3,189
Property and equipment	28,088
Goodwill	22,592
Intangible assets	1,406
Other assets	159
Total assets acquired	62,437
Accounts payable	7,290
Accrued salaries and benefits	2,594
Other accrued expenses	1,195
Other liabilities	2,553
Total liabilities assumed	13,632
Net assets acquired	48,805
2012 Acquisitions [Member]
Business Acquisition [Line Items]
Cash		1,648
Accounts receivable		19,097
Prepaid expenses and other current assets		5,031
Property and equipment		78,315
Goodwill		369,019
Intangible assets		7,980
Other assets		3,467
Total assets acquired		484,557
Accounts payable		7,995
Accrued salaries and benefits		7,334
Other accrued expenses		3,399
Debt		25,600
Other liabilities		1,970
Total liabilities assumed		46,298
Net assets acquired		438,259
2012 Acquisitions [Member] \| BCA [Member]
Business Acquisition [Line Items]
Cash		5
Accounts receivable		6,980
Prepaid expenses and other current assets		1,291
Property and equipment		23,561
Goodwill		116,609
Intangible assets		1,161
Other assets		326
Total assets acquired		149,933
Accounts payable		3,602
Accrued salaries and benefits		2,207
Other accrued expenses		697
Other liabilities		475
Total liabilities assumed		6,981
Net assets acquired		142,952
2012 Acquisitions [Member] \| AmiCare [Member]
Business Acquisition [Line Items]
Cash		1,596
Accounts receivable		3,684
Prepaid expenses and other current assets		1,509
Property and equipment		23,150
Goodwill		86,491
Intangible assets		1,267
Total assets acquired		117,697
Accounts payable		504
Accrued salaries and benefits		2,508
Other accrued expenses		627
Other liabilities		1,495
Total liabilities assumed		5,134
Net assets acquired		112,563
2012 Acquisitions [Member] \| Park Royal [Member]
Business Acquisition [Line Items]
Cash		42
Accounts receivable		1,450
Prepaid expenses and other current assets		1,258
Property and equipment		18,291
Goodwill		19,320
Intangible assets		1,035
Other assets		3,141
Total assets acquired		44,537
Accounts payable		695
Accrued salaries and benefits		443
Other accrued expenses		1,079
Debt		25,600
Total liabilities assumed		27,817
Net assets acquired		16,720
2012 Acquisitions [Member] \| Timberline Knolls [Member]
Business Acquisition [Line Items]
Accounts receivable		2,845
Prepaid expenses and other current assets		170
Property and equipment		590
Goodwill		72,164
Intangible assets		3,317
Total assets acquired		79,086
Accounts payable		2,011
Accrued salaries and benefits		653
Other accrued expenses		869
Total liabilities assumed		3,533
Net assets acquired		75,553
2012 Acquisitions [Member] \| Haven Facilities [Member]
Business Acquisition [Line Items]
Cash		5
Accounts receivable		4,138
Prepaid expenses and other current assets		803
Property and equipment		12,723
Goodwill		74,435
Intangible assets		1,200
Total assets acquired		93,304
Accounts payable		1,183
Accrued salaries and benefits		1,523
Other accrued expenses		127
Total liabilities assumed		2,833
Net assets acquired		$ 90,471

Acquisitions - Transaction Related Expenses as Incurred (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Business Combinations [Abstract]
Legal, accounting and other fees	$ 841	$ 629	$ 2,644	$ 1,958
Severance and contract termination costs	143	103	1,169	139
Transaction-related expenses	$ 984	$ 732	$ 3,813	$ 2,097

Acquisitions - Pro Forma Financial Information for Acquisitions Occurred (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Business Combinations [Abstract]
Revenue	$ 185,752	$ 163,935	$ 542,637	$ 489,612
Income from continuing operations, before income taxes	$ 22,357	$ 13,553	$ 50,888	$ 39,082

Goodwill and Other Intangible Assets - Summary of Changes in Goodwill (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013
Goodwill And Intangible Assets Disclosure [Abstract]
Beginning Balance	$ 557,402
Increase from 2013 acquisitions	90,136
Other	(528)
Ending Balance	$ 647,010

Goodwill and Other Intangible Assets - Other Identifiable Intangible Assets and Related Accumulated Amortization (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Schedule Of Finite and Indefinite Lived Other Intangible Assets [Line Items]
Intangible assets subject to amortization, Gross Carrying Amount	$ 3,347	$ 3,347
Intangible assets not subject to amortization, Gross Carrying Amount	17,605	13,815
Total	20,952	17,162
Intangible assets subject to amortization, Accumulated Amortization	(1,769)	(1,174)
Intangible assets not subject to amortization, Accumulated Amortization
Total	(1,769)	(1,174)
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	(805)	(490)
Non-Compete Agreements [Member]
Schedule Of Finite and Indefinite Lived Other Intangible Assets [Line Items]
Intangible assets subject to amortization, Gross Carrying Amount	1,247	1,247
Intangible assets subject to amortization, Accumulated Amortization	(964)	(684)
Licenses and Accreditations [Member]
Schedule Of Finite and Indefinite Lived Other Intangible Assets [Line Items]
Intangible assets not subject to amortization, Gross Carrying Amount	7,711	6,969
Intangible assets not subject to amortization, Accumulated Amortization
Trade Names [Member]
Schedule Of Finite and Indefinite Lived Other Intangible Assets [Line Items]
Intangible assets not subject to amortization, Gross Carrying Amount	3,000	3,000
Intangible assets not subject to amortization, Accumulated Amortization
Certificates of Need [Member]
Schedule Of Finite and Indefinite Lived Other Intangible Assets [Line Items]
Intangible assets not subject to amortization, Gross Carrying Amount	6,894	3,846
Intangible assets not subject to amortization, Accumulated Amortization

Property and Equipment - Summary of Property and Equipment (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 354,627	$ 249,972
Less accumulated depreciation	(24,892)	(13,030)
Property and equipment, net	329,735	236,942
Land [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	50,312	39,130
Building and Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	227,205	171,769
Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	33,715	19,773
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 43,395	$ 19,300

Discontinued Operations - Summary of Results from Discontinued Operations (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Discontinued Operations And Disposal Groups [Abstract]
Revenue	$ (264)		$ (363)	$ 3,570
(Loss) income from discontinued operations, net of income taxes	$ (182)	$ (138)	$ (572)	$ 22

Long-Term Debt - Components of Long Term Debt (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	Nov. 01, 2011
Line of Credit Facility [Line Items]
Aggregate senior note principal amount	$ 585,260	$ 473,318	$ 150,000
Less: current portion	(13,305)	(7,680)
Long-term debt	571,955	465,638
Senior Secured Term Loans [Member]
Line of Credit Facility [Line Items]
Aggregate senior note principal amount	294,375	300,000
Senior Secured Revolving Line of Credit [Member]
Line of Credit Facility [Line Items]
Aggregate senior note principal amount	19,500
12.875% Senior Notes Due 2018 [Member]
Line of Credit Facility [Line Items]
Aggregate senior note principal amount	96,171	147,757
6.125% Senior Notes Due 2021 [Member]
Line of Credit Facility [Line Items]
Aggregate senior note principal amount	150,000
9.0% and 9.5% Revenue Bonds [Member]
Line of Credit Facility [Line Items]
Aggregate senior note principal amount	$ 25,214	$ 25,561

Long-Term Debt - Components of Long Term Debt (Parenthetical) (Detail)	9 Months Ended
	Sep. 30, 2013
12.875% Senior Notes Due 2018 [Member]
Line of Credit Facility [Line Items]
Debt instrument interest rate	12.875%
Senior notes maturity date	2018
6.125% Senior Notes Due 2021 [Member]
Line of Credit Facility [Line Items]
Debt instrument interest rate	6.125%
Senior notes maturity date	2021
9.0% Revenue Bonds [Member]
Line of Credit Facility [Line Items]
Debt instrument interest rate	9.00%
9.5% Revenue Bonds [Member]
Line of Credit Facility [Line Items]
Debt instrument interest rate	9.50%

Long-Term Debt - Additional Information (Detail) (USD $)	9 Months Ended						1 Months Ended						1 Months Ended		1 Months Ended		12 Months Ended		1 Months Ended		9 Months Ended				1 Months Ended	12 Months Ended		1 Months Ended	9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Nov. 01, 2011	Mar. 01, 2012 Haven Facilities [Member]	Sep. 30, 2013 Park Royal [Member]	Dec. 31, 2012 Park Royal [Member]	Mar. 01, 2012 Minimum [Member]	Mar. 01, 2012 Maximum [Member]	Sep. 30, 2013 9.0% and 9.5% Revenue Bonds [Member]	Dec. 31, 2012 9.0% and 9.5% Revenue Bonds [Member]	Nov. 11, 2012 9.0% and 9.5% Revenue Bonds [Member] Park Royal [Member]	Sep. 30, 2013 9.0% Revenue Bonds [Member]	Nov. 11, 2012 9.0% Revenue Bonds [Member] Park Royal [Member]	Sep. 30, 2013 9.5% Revenue Bonds [Member]	Nov. 11, 2012 9.5% Revenue Bonds [Member] Park Royal [Member]	Mar. 01, 2012 Term Loans [Member]	Dec. 31, 2012 Term Loans [Member]	Dec. 31, 2012 Term Loans [Member] Amended and Restated Credit Facility [Member]	Mar. 01, 2012 Revolving Credit Facility [Member]	Dec. 31, 2012 Revolving Credit Facility [Member] Amended and Restated Credit Facility [Member]	Sep. 30, 2013 Eurodollar Rate Loans [Member]	Sep. 30, 2013 Base Rate Loans [Member]	Sep. 30, 2013 Senior Secured Credit Facility [Member]	Sep. 30, 2013 Senior Secured Credit Facility [Member] Term Loans [Member]	Mar. 12, 2013 12.875% Senior Notes Due 2018 [Member]	Dec. 31, 2011 12.875% Senior Notes Due 2018 [Member]	Nov. 01, 2011 12.875% Senior Notes Due 2018 [Member]	Mar. 12, 2013 6.125% Senior Notes Due 2021 [Member]	Sep. 30, 2013 6.125% Senior Notes Due 2021 [Member]	Sep. 30, 2013 September 30, 2013 to December 31, 2013 [Member]	Sep. 30, 2013 March 31, 2014 to December 31, 2014 [Member]	Sep. 30, 2013 March 31, 2015 to December 31, 2015 [Member]	Sep. 30, 2013 March 31, 2016 to December 31, 2016 [Member]	Sep. 30, 2013 March 31,2017 to September 30,2017 [Member]
Debt Instrument [Line Items]
Senior secured credit facility initiation date																							Apr. 01, 2011
Term loans																		$ 300,000,000						$ 135,000,000
Revolving line of credit																							30,000,000
Increase in term loans																25,000,000
Increase in credit facility	50,000,000						30,000,000												45,000,000
Maximum borrowing capacity								75,000,000
Revolving line of credit for acquisition				5,000,000
Amount under revolving line of credit																				100,000,000
Debt proceeds from revolving line of credit																		151,100,000
Fund used for acquisition																	151,100,000
Amount available under revolving line of credit	80,100,000
Term loan principal payments																														1,900,000	3,800,000	5,600,000	7,500,000	9,400,000
Debt instrument maturity date													Dec. 01, 2030		Dec. 01, 2040								Dec. 31, 2017					Mar. 15, 2021
Interest on borrowings																					3.25%	2.25%	3.25%
Basis spread on variable rate																					1.00%	0.50%
Interest on undrawn loans																							0.50%
Debt instrument amount													7,500,000		15,500,000												150,000,000	150,000,000
Issue rate of senior notes																											98.323%	6.125%
Discount value on principal amount																											2,500,000
Debt instrument interest rate												9.00%	9.00%	9.50%	9.50%										12.875%		12.875%
Interest on the notes																										Semi-annually, in arrears, on November 1 and May 1 of each year		Payable semi-annually in arrears on March 15 and September 15 of each year, beginning on September 15, 2013
Aggregate senior note principal amount	585,260,000	473,318,000	150,000,000						25,214,000	25,561,000
Debt instrument, maximum redemption amount																									52,500,000
Debt instrument, redemption price percentage																									112.875%				100.00%
Redemption percentage of senior notes																									35.00%				35.00%
Debt extinguishment charge	(9,350,000)																								9,400,000
Senior notes terms																													The Company may redeem the 6.125% Senior Notes at its option, in whole or part, at any time prior to March 15, 2016, at a price equal to 100% of the principal amount of the 6.125% Senior Notes redeemed, plus accrued and unpaid interest to the redemption date and plus an applicable premium. The Company may redeem the Notes, in whole or in part, on or after March 15, 2016, at the redemption prices set forth in the Indenture plus accrued and unpaid interest to the redemption date. At any time on or before March 15, 2016, the Company may elect to redeem up to 35% of the aggregate principal amount of the 6.125% Senior Notes at a redemption price equal to 106.125% of the principal amount thereof, plus accrued and unpaid interest to the redemption date, with the net proceeds of one or more equity offerings.
Redemption percentage of senior notes before specified time																													106.125%
Assumed debt on acquisition											23,000,000		7,500,000		15,500,000
Fair market value of the debt assumed											25,600,000
Debt service reserve fund within other assets					2,200,000	2,200,000
Debt instrument premium											$ 2,600,000

Equity - Additional Information (Detail) (USD $)	0 Months Ended	1 Months Ended	9 Months Ended
Equity - Additional Information (Detail) (USD $)	Dec. 12, 2012	May 21, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Dec. 24, 2012
Equity [Line Items]
Preferred stock may issue			10,000,000		10,000,000
Common stock may issue			90,000,000		90,000,000
Common stock voting rights			One vote for each share
Common stock offered	7,000,000	9,487,500	50,041,813		49,887,300	1,050,000
Common stock offer price	$ 22.50	$ 15.50	$ 0.01		$ 0.01
Underwriting discount amount	$ 7,300,000	$ 7,400,000
Additional offering-related expenses	1,000,000	700,000
Net proceeds from sale of shares	172,800,000	139,000,000		138,954,000
Equity [Member]
Equity [Line Items]
Debt instrument, maximum redemption amount	$ 52,500,000
Senior notes interest percentage	12.875%

Equity-Based Compensation - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorized common stock	4,700,000		4,700,000
Annual increments in employee grants			25.00%
Stock options, contractual term			10 years
Equity-based compensation expense	$ 1,331,000	$ 521,000	$ 3,744,000	$ 1,691,000
Incremental equity based compensation charges			600,000
Share based compensation arrangement by share based payment award plan modification incremental compensation shares			20,090
Unrecognized compensation expense related to unvested options			15,300,000
Weighted average vesting period			1 year 7 months 6 days
Intrinsic value of options exercised	100,000		2,200,000
Warrants outstanding and exercisable	3,750		3,750
Weighted average exercise price	14.00		14.00
Deferred income tax benefit			10,545,000	8,138,000
Tax realized from stock options exercised	100,000	0	1,300,000	0
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of unvested stock awards	$ 23.63		$ 23.63
Stock Compensation Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred income tax benefit	$ 600,000	$ 0	$ 1,500,000	$ 0

Equity-Based Compensation - Stock Option Activity (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Dec. 31, 2011
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Options outstanding, Beginning balance	555,097	346,821
Options granted	387,800	429,498
Options exercised	(111,787)	(124,194)
Options cancelled	(28,826)	(97,028)
Options outstanding, Ending balance	802,284	555,097	346,821
Options outstanding, Weighted Average Exercise Price, Beginning balance	$ 13.13	$ 7.74
Options exercisable, Ending balance	131,210	164,062
Options granted, Weighted Average Exercise Price	$ 29.80	$ 16.36
Options exercised, Weighted Average Exercise Price	$ 10.21	$ 8.01
Options cancelled, Weighted Average Exercise Price	$ 21.82	$ 14.70
Options outstanding, Weighted Average Exercise Price, Ending balance	$ 21.07	$ 13.13	$ 7.74
Options outstanding, Aggregate Intrinsic Value, Beginning balance	$ 5,632	$ 947
Options exercisable, Weighted Average Exercise Price, Ending balance	$ 9.38	$ 6.63
Options granted, Aggregate Intrinsic Value	1,031	2,960
Options granted, Weighted Average Remaining Contractual Term	9 years 4 months 13 days	9 years 2 months 19 days
Options exercised, Aggregate Intrinsic Value
Options outstanding, Weighted Average Remaining Contractual Term	8 years 2 months 23 days	7 years 6 months 11 days	4 years 6 months
Options cancelled, Aggregate Intrinsic Value
Options exercisable, Weighted Average Remaining Contractual Term, Ending balance	4 years 3 months 18 days	3 years 7 months 2 days
Options outstanding, Aggregate Intrinsic Value, Ending balance	9,210	5,632	947
Options exercisable, Aggregate Intrinsic Value, Ending balance	$ 3,345	$ 2,707

Equity-Based Compensation - Restricted Stock Activity (Detail) (Restricted Stock Award [Member], USD $)	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Restricted Stock Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested, Number of Shares, Beginning balance	318,063	138,321
Granted, Number of Shares	266,845	318,170
Cancelled, Number of Shares	(40,856)	(42,107)
Vested, Number of Shares	(75,247)	(96,321)
Unvested, Number of Shares, Ending balance	468,805	318,063
Unvested, Weighted Average Grant-Date Fair Value, Beginning balance	$ 15.73	$ 9.40
Granted, Weighted Average Grant-Date Fair Value	$ 30.28	$ 13.04
Cancelled, Weighted Average Grant-Date Fair Value	$ 19.47	$ 14.25
Vested, Weighted Average Grant-Date Fair Value	$ 16.08	$ 9.40
Unvested , Weighted Average Grant-Date Fair Value, Ending balance	$ 23.63	$ 15.73

Equity-Based Compensation - Restricted Stock Unit Activity (Detail) (Restricted Stock Units [Member], USD $)	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested, Number of Shares, Beginning balance	68,628
Granted, Number of Shares	72,876	86,485
Cancelled, Number of Shares		(17,857)
Vested, Number of Shares	(45,753)
Unvested, Number of Shares, Ending balance	95,751	68,628
Unvested, Weighted Average Grant-Date Fair Value, Beginning balance	$ 16.11
Granted, Weighted Average Grant-Date Fair Value	$ 29.39	$ 16.11
Cancelled, Weighted Average Grant-Date Fair Value		$ 15.96
Vested, Weighted Average Grant-Date Fair Value	$ 16.11
Unvested , Weighted Average Grant-Date Fair Value, Ending balance	$ 23.05	$ 16.11

Equity-Based Compensation - Schedule of Stock Options Valuation Assumptions (Detail) (USD $)	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Weighted average grant-date fair value of options	$ 11.32	$ 6.93
Risk-free interest rate	1.00%	1.20%
Expected volatility	40.00%	42.00%
Expected life (in years)	5 years 6 months	6 years 3 months 18 days

Fair Value Measurements - Carrying Amounts and Fair Values of Company's Amended and Restated Senior Credit Facilities and Contingent Consideration Liability (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	Nov. 01, 2011
Disclosures Regarding Financial Instruments [Line Items]
Senior credit facility, carrying amount	$ 585,260	$ 473,318	$ 150,000
Business acquisition contingent consideration, carrying amount	6,500	6,120
Business acquisition contingent consideration, at fair value	6,500	6,120
Amended and Restated Senior Credit Facility [Member]
Disclosures Regarding Financial Instruments [Line Items]
Senior credit facility, carrying amount	313,875	300,000
Senior credit facility, fair value	313,875	300,000
12.875% Senior Notes Due 2018 [Member]
Disclosures Regarding Financial Instruments [Line Items]
Senior credit facility, carrying amount	96,171	147,757
Senior credit facility, fair value	117,731	181,500
6.125% Senior Notes Due 2021 [Member]
Disclosures Regarding Financial Instruments [Line Items]
Senior credit facility, carrying amount	150,000
Senior credit facility, fair value	153,750
9.0% and 9.5% Revenue Bonds [Member]
Disclosures Regarding Financial Instruments [Line Items]
Senior credit facility, carrying amount	25,214	25,561
Senior credit facility, fair value	$ 25,214	$ 25,561

Fair Value Measurements - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2013
Disclosures Regarding Financial Instruments [Line Items]
Increase in fair value of contingent consideration liability	$ 0.4
12.875% Senior Notes Due 2018 [Member]
Disclosures Regarding Financial Instruments [Line Items]
Debt instrument interest rate	12.875%
6.125% Senior Notes Due 2021 [Member]
Disclosures Regarding Financial Instruments [Line Items]
Debt instrument interest rate	6.125%
9.0% Revenue Bonds [Member]
Disclosures Regarding Financial Instruments [Line Items]
Debt instrument interest rate	9.00%
9.5% Revenue Bonds [Member]
Disclosures Regarding Financial Instruments [Line Items]
Debt instrument interest rate	9.50%

Financial Information for the Company and Its Subsidiaries - Summary of Condensed Consolidating Balance Sheets (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 4,034	$ 49,399	$ 11,719	$ 61,118
Accounts receivable, net	93,311	63,870
Deferred tax assets	13,019	11,380
Other current assets	32,516	16,332
Total current assets	142,880	140,981
Property and equipment, net	329,735	236,942
Goodwill	647,010	557,402
Intangible assets, net	19,183	15,988
Other assets	24,178	32,100
Total assets	1,162,986	983,413
Current liabilities:
Current portion of long-term debt	13,305	7,680
Accounts payable	26,449	19,081
Accrued salaries and benefits	32,284	28,749
Other accrued liabilities	29,235	16,341
Total current liabilities	101,273	71,851
Long-term debt	571,955	465,638
Deferred tax liabilities - noncurrent	4,979	998
Other liabilities	18,246	12,376
Total liabilities	696,453	550,863
Total equity	466,533	432,550
Total liabilities and equity	1,162,986	983,413
Parent [Member]
Current assets:
Investment in subsidiaries	983,456	868,165
Other assets	14,158	13,562
Total assets	997,614	881,727
Current liabilities:
Current portion of long-term debt	13,125	7,500
Other accrued liabilities	5,692	3,259
Total current liabilities	18,817	10,759
Long-term debt	513,996	440,257
Deferred tax liabilities - noncurrent	(1,732)	(1,839)
Total liabilities	531,081	449,177
Total equity	466,533	432,550
Total liabilities and equity	997,614	881,727
Combined Subsidiary Guarantors [Member]
Current assets:
Cash and cash equivalents		49,307	11,719	61,118
Accounts receivable, net	85,376	61,359
Deferred tax assets	12,705	11,323
Other current assets	31,504	16,074
Total current assets	129,585	138,063
Property and equipment, net	299,219	218,716
Goodwill	549,721	537,296
Intangible assets, net	17,193	14,953
Other assets	7,699	16,217
Total assets	1,003,417	925,245
Current liabilities:
Accounts payable	26,573	18,048
Accrued salaries and benefits	31,037	28,285
Other accrued liabilities	21,524	12,853
Total current liabilities	79,134	59,186
Deferred tax liabilities - noncurrent	12,842	3,793
Other liabilities	18,246	12,376
Total liabilities	110,222	75,355
Total equity	893,195	849,890
Total liabilities and equity	1,003,417	925,245
Combined Subsidiary Non-Guarantors [Member]
Current assets:
Cash and cash equivalents	5,350	92
Accounts receivable, net	7,935	2,511
Deferred tax assets	314	57
Other current assets	1,012	258
Total current assets	14,611	2,918
Property and equipment, net	30,516	18,226
Goodwill	97,289	20,106
Intangible assets, net	1,990	1,035
Other assets	2,321	2,321
Total assets	146,727	44,606
Current liabilities:
Current portion of long-term debt	180	180
Accounts payable	1,192	1,033
Accrued salaries and benefits	1,247	464
Other accrued liabilities	2,019	229
Total current liabilities	4,638	1,906
Long-term debt	57,959	25,381
Deferred tax liabilities - noncurrent	(6,131)	(956)
Total liabilities	56,466	26,331
Total equity	90,261	18,275
Total liabilities and equity	146,727	44,606
Consolidating Adjustments [Member]
Current assets:
Cash and cash equivalents	(1,316)
Total current assets	(1,316)
Investment in subsidiaries	(983,456)	(868,165)
Total assets	(984,772)	(868,165)
Current liabilities:
Accounts payable	(1,316)
Total current liabilities	(1,316)
Total liabilities	(1,316)
Total equity	(983,456)	(868,165)
Total liabilities and equity	$ (984,772)	$ (868,165)

Financial Information for the Company and Its Subsidiaries - Summary of Condensed Consolidating Statement of Operations (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Condensed Financial Statements, Captions [Line Items]
Revenue before provision for doubtful accounts	$ 190,574	$ 104,618	$ 539,230	$ 298,638
Provision for doubtful accounts	(5,872)	(1,502)	(15,821)	(5,429)
Revenue	184,702	103,116	523,409	293,209
Salaries, wages and benefits	103,789	59,888	298,904	173,590
Professional fees	8,956	4,690	27,294	13,521
Supplies	9,806	4,831	28,017	14,148
Rents and leases	2,656	1,775	7,377	6,244
Other operating expenses	22,345	11,380	59,424	30,768
Depreciation and amortization	4,414	2,076	12,248	5,332
Interest expense, net	9,465	7,433	27,672	22,186
Debt extinguishment costs			9,350
Transaction-related expenses	984	732	3,813	2,097
Total expenses	162,415	92,805	474,099	267,886
(Loss) income from continuing operations before income taxes	22,287	10,311	49,310	25,323
(Benefit from) provision for income taxes	7,741	3,723	18,439	9,307
Income from continuing operations	14,546	6,588	30,871	16,016
(Loss) income from discontinued operations, net of income taxes	(182)	(138)	(572)	22
Net income (loss)	14,364	6,450	30,299	16,038
Parent [Member]
Condensed Financial Statements, Captions [Line Items]
Salaries, wages and benefits	1,331	521	3,744	1,691
Interest expense, net	8,542	7,433	25,570	22,186
Debt extinguishment costs			9,350
Total expenses	9,873	7,954	38,664	23,877
(Loss) income from continuing operations before income taxes	(9,873)	(7,954)	(38,664)	(23,877)
Equity in earnings of subsidiaries	21,087	11,532	(54,340)	(31,139)
(Benefit from) provision for income taxes	(3,150)	(2,872)	(14,623)	(8,776)
Income from continuing operations	14,364	6,450	30,299	16,038
Net income (loss)	14,364	6,450	30,299	16,038
Combined Subsidiary Guarantors [Member]
Condensed Financial Statements, Captions [Line Items]
Revenue before provision for doubtful accounts	179,560	104,618	516,467	298,638
Provision for doubtful accounts	(5,660)	(1,502)	(14,932)	(5,429)
Revenue	173,900	103,116	501,535	293,209
Salaries, wages and benefits	98,166	59,367	285,760	171,899
Professional fees	7,954	4,690	25,447	13,521
Supplies	9,170	4,831	26,718	14,148
Rents and leases	2,394	1,775	6,872	6,244
Other operating expenses	19,896	11,380	53,922	30,768
Depreciation and amortization	4,072	2,076	11,379	5,332
Transaction-related expenses	984	732	3,813	2,097
Total expenses	142,636	84,851	413,911	244,009
(Loss) income from continuing operations before income taxes	31,264	18,265	87,624	49,200
(Benefit from) provision for income taxes	10,680	6,595	33,143	18,083
Income from continuing operations	20,584	11,670	54,481	31,117
(Loss) income from discontinued operations, net of income taxes	(182)	(138)	(572)	22
Net income (loss)	20,402	11,532	53,909	31,139
Combined Subsidiary Non-Guarantors [Member]
Condensed Financial Statements, Captions [Line Items]
Revenue before provision for doubtful accounts	11,014		22,763
Provision for doubtful accounts	(212)		(889)
Revenue	10,802		21,874
Salaries, wages and benefits	4,292		9,400
Professional fees	1,002		1,847
Supplies	636		1,299
Rents and leases	262		505
Other operating expenses	2,449		5,502
Depreciation and amortization	342		869
Interest expense, net	923		2,102
Total expenses	9,906		21,524
(Loss) income from continuing operations before income taxes	896		350
(Benefit from) provision for income taxes	211		(81)
Income from continuing operations	685		431
Net income (loss)	685		431
Consolidating Adjustments [Member]
Condensed Financial Statements, Captions [Line Items]
Equity in earnings of subsidiaries	(21,087)	(11,532)	54,340	31,139
Income from continuing operations	(21,087)	(11,532)	(54,340)	(31,139)
Net income (loss)	$ (21,087)	$ (11,532)	$ (54,340)	$ (31,139)

Financial Information for the Company and Its Subsidiaries - Summary of Condensed Consolidating Statement of Cash Flows (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Operating activities:
Net income (loss)	$ 30,299	$ 16,038
Adjustments to reconcile net income (loss) to net cash provided by (used in) continuing operating activities:
Depreciation and amortization	12,248	5,332
Amortization of debt issuance costs	1,686	1,869
Equity-based compensation expense	3,744	1,691
Deferred income tax expense	10,545	8,138
(Loss) income from discontinued operations, net of income taxes	572	(22)
Debt extinguishment costs	9,350
Other	16	(9)
Change in operating assets and liabilities, net of effect of acquisitions:
Accounts receivable, net	(18,378)	(13,597)
Other current assets	(5,657)	(3,677)
Other assets	(1,676)	1,029
Accounts payable and other accrued liabilities	2,596	4,817
Accrued salaries and benefits	(3,467)	527
Other liabilities	3,538	1,527
Net cash provided by continuing operating activities	45,416	23,663
Net cash used in discontinued operating activities	(541)	(328)
Net cash provided by (used in) operating activities	44,875	23,335
Investing activities:
Cash paid for acquisitions, net of cash acquired	(135,605)	(165,981)
Cash paid for capital expenditures	(50,678)	(14,511)
Cash paid for real estate acquisitions	(4,676)	(50,745)
Other	(1,088)	1,231
Net cash used in investing activities	(192,047)	(230,006)
Financing activities:
Borrowings on long-term debt	150,000	25,000
Net increase in revolving credit facility	19,500
Principal payments on long-term debt	(5,625)	(6,000)
Repayment of long-term debt	(52,500)
Payment of debt issuance costs	(4,307)	(1,197)
Payment of premium on note redemption	(6,759)
Issuance of common stock		138,954
Proceeds from stock option exercises	233	515
Excess tax benefit from equity awards	1,265
Net cash provided by financing activities	101,807	157,272
Net (decrease) increase in cash and cash equivalents	(45,365)	(49,399)
Cash and cash equivalents at beginning of the period	49,399	61,118
Cash and cash equivalents at end of the period	4,034	11,719
Parent [Member]
Operating activities:
Net income (loss)	30,299	16,038
Adjustments to reconcile net income (loss) to net cash provided by (used in) continuing operating activities:
Amortization of debt issuance costs	1,686	1,869
Equity-based compensation expense	3,744	1,691
Deferred income tax expense	(70)	(439)
Debt extinguishment costs	9,350
Change in operating assets and liabilities, net of effect of acquisitions:
Equity in earnings of subsidiaries	54,340	31,139
Net cash provided by continuing operating activities	99,349	50,298
Net cash provided by (used in) operating activities	99,349	50,298
Financing activities:
Borrowings on long-term debt	150,000	25,000
Net increase in revolving credit facility	19,500
Principal payments on long-term debt	(5,625)	(6,000)
Repayment of long-term debt	(52,500)
Payment of debt issuance costs	(4,307)	(1,197)
Payment of premium on note redemption	(6,759)
Issuance of common stock		138,954
Proceeds from stock option exercises	233	515
Excess tax benefit from equity awards	1,265
Cash (used in) provided by intercompany activity	(201,156)	(207,570)
Net cash provided by financing activities	(99,349)	(50,298)
Combined Subsidiary Guarantors [Member]
Operating activities:
Net income (loss)	53,909	31,139
Adjustments to reconcile net income (loss) to net cash provided by (used in) continuing operating activities:
Depreciation and amortization	11,379	5,332
Deferred income tax expense	10,797	8,577
(Loss) income from discontinued operations, net of income taxes	572	(22)
Other	16	(9)
Change in operating assets and liabilities, net of effect of acquisitions:
Accounts receivable, net	(18,920)	(13,597)
Other current assets	(5,638)	(3,677)
Other assets	(1,676)	1,029
Accounts payable and other accrued liabilities	2,763	4,817
Accrued salaries and benefits	(3,660)	527
Other liabilities	7,693	1,527
Net cash provided by continuing operating activities	57,235	35,643
Net cash used in discontinued operating activities	(541)	(328)
Net cash provided by (used in) operating activities	56,694	35,315
Investing activities:
Cash paid for acquisitions, net of cash acquired	(135,605)	(165,981)
Cash paid for capital expenditures	(50,378)	(14,511)
Cash paid for real estate acquisitions	(4,676)	(50,745)
Other	(1,088)	1,231
Net cash used in investing activities	(191,747)	(230,006)
Financing activities:
Cash (used in) provided by intercompany activity	85,746	145,292
Net cash provided by financing activities	85,746	145,292
Net (decrease) increase in cash and cash equivalents	(49,307)	(49,399)
Cash and cash equivalents at beginning of the period	49,307	61,118
Cash and cash equivalents at end of the period		11,719
Combined Subsidiary Non-Guarantors [Member]
Operating activities:
Net income (loss)	431
Adjustments to reconcile net income (loss) to net cash provided by (used in) continuing operating activities:
Depreciation and amortization	869
Deferred income tax expense	(182)
Change in operating assets and liabilities, net of effect of acquisitions:
Accounts receivable, net	542
Other current assets	(19)
Accounts payable and other accrued liabilities	(167)
Accrued salaries and benefits	193
Other liabilities	(4,155)
Net cash provided by continuing operating activities	(2,488)
Net cash provided by (used in) operating activities	(2,488)
Investing activities:
Cash paid for capital expenditures	(300)
Net cash used in investing activities	(300)
Financing activities:
Cash (used in) provided by intercompany activity	8,046
Net cash provided by financing activities	8,046
Net (decrease) increase in cash and cash equivalents	5,258
Cash and cash equivalents at beginning of the period	92
Cash and cash equivalents at end of the period	5,350
Consolidating Adjustments [Member]
Operating activities:
Net income (loss)	(54,340)	(31,139)
Change in operating assets and liabilities, net of effect of acquisitions:
Equity in earnings of subsidiaries	(54,340)	(31,139)
Net cash provided by continuing operating activities	(108,680)	(62,278)
Net cash provided by (used in) operating activities	(108,680)	(62,278)
Financing activities:
Cash (used in) provided by intercompany activity	107,364	62,278
Net cash provided by financing activities	107,364	62,278
Net (decrease) increase in cash and cash equivalents	(1,316)
Cash and cash equivalents at end of the period	$ (1,316)

Income Taxes - Additional Information (Detail)	3 Months Ended		9 Months Ended
Income Taxes - Additional Information (Detail)	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income Tax Disclosure [Abstract]
Effective tax rates	34.70%	36.10%	37.40%	36.80%