Commitments and Contingencies - Additional Information (Detail) (USD $)				3 Months Ended	12 Months Ended					1 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Nov. 15, 2010	Jun. 30, 2013 Professional And General Liability Psi Subsidiaries	Dec. 31, 2012 Professional And General Liability Psi Subsidiaries	Dec. 31, 2011 Professional And General Liability Psi Subsidiaries	Sep. 30, 2013 Self Insurance Programs	Sep. 30, 2013 Other debt and public utility guarantees	Sep. 30, 2013 Puerto Rico	Mar. 31, 2013 Illinois	Sep. 30, 2013 Illinois	Dec. 31, 2012 Illinois	Sep. 30, 2013 Earthquake	Sep. 30, 2013 Earthquake United States	Nov. 15, 2010 Minimum	Sep. 30, 2013 Minimum Location 2	Sep. 30, 2013 Minimum Location 1	Sep. 30, 2013 Minimum Wind Storms	Sep. 30, 2013 Minimum Earthquake United States	Nov. 15, 2010 Maximum	Sep. 30, 2013 Maximum Wind Storms	Sep. 30, 2013 Maximum Earthquake United States	Sep. 30, 2013 Maximum Flood Location 2	Sep. 30, 2013 Maximum Flood Location 1	Jan. 01, 2008 Subsidiaries Minimum	Nov. 15, 2010 Subsidiaries Maximum	Sep. 30, 2013 Psychiatric Solutions Inc Minimum	Sep. 30, 2013 Psychiatric Solutions Inc Maximum	Sep. 30, 2013 Psychiatric Solutions Inc Maximum General and Professional Liability Insurance Policies	Sep. 30, 2013 Legacy Subsidiaries Maximum General and Professional Liability Insurance Policies	Sep. 30, 2013 Behavioral Health Facilities Acquired from Ascend Health Corporation General and Professional Liability Insurance Policies	Sep. 30, 2013 Behavioral Health Facilities Acquired from Ascend Health Corporation Commercial Property Insurance Policies	Sep. 30, 2013 Behavioral Health Facilities Acquired from Ascend Health Corporation Maximum General and Professional Liability Insurance Policies	Oct. 30, 2012 Behavioral Health Facilities Acquired from Ascend Health Corporation Maximum General and Professional Liability Insurance Policies
Commitments and Contingencies Disclosure [Line Items]
Self-insured for professional and general liability	$ 220,000,000	$ 279,000,000																							$ 10,000,000		$ 3,000,000	$ 75,000,000	$ 3,000,000	$ 10,000,000			$ 20,000,000
Purchased several excess policies through commercial insurance carriers per occurrence																										200,000,000								200,000,000
Percentage of liability for claims paid under commercially insured coverage			10.00%
Liability for claims paid under commercially insured coverage															10,000,000					60,000,000
Minimum Insurance Deductible																250,000	50,000														10,000	10,000
Self-insured for professional and general liability, current	48,000,000	48,000,000
Reduction in professional and general liability self-insurance reserves relating to prior years				65,000,000
Weighting given to company-specific metrics					100.00%	75.00%
General industry metrics					0.00%	25.00%
Compensation liability claims	68,000,000	66,000,000
Compensation and related benefits	35,000,000	35,000,000
Commercial property insurance policies covering catastrophic losses									25,000,000				250,000,000	100,000,000							1,000,000,000
Percentage of insurance deductible																		3.00%	1.00%		5.00%	5.00%
Maximum insurance deductible																							500,000	250,000
Accounts receivable, net	1,166,514,000	1,067,197,000									29,000,000	70,000,000
Accounts receivable net greater than sixty days Past due											10,000,000	51,000,000
Cash received from collection accounts receivables										72,000,000
Off-balance sheet contingent obligation	$ 88,000,000						$ 70,000,000	$ 18,000,000