Commitments and Contingencies - Additional Information (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014 Letters of Credit and Surety Bonds	Mar. 31, 2014 Self Insurance Programs Letters of Credit and Surety Bonds	Mar. 31, 2014 Other Debt Guarantees Letters of Credit and Surety Bonds	Mar. 31, 2014 Location 2	Mar. 31, 2014 Location 1	Mar. 31, 2014 Illinois	Dec. 31, 2013 Illinois	Mar. 31, 2014 Wind Storms Minimum	Mar. 31, 2014 Wind Storms Maximum	Mar. 31, 2014 Earthquake	Mar. 31, 2014 Earthquake Maximum	Mar. 31, 2014 Earthquake UNITED STATES Minimum	Mar. 31, 2014 Earthquake UNITED STATES Maximum	Mar. 31, 2014 Earthquake PUERTO RICO	Mar. 31, 2014 Flood Location 2	Mar. 31, 2014 Flood Location 1	Nov. 30, 2010 Subsidiaries Professional Liability Maximum	Nov. 30, 2010 Subsidiaries General Liability Maximum	Mar. 31, 2014 Subsidiaries General and Professional Liability Insurance Policies	Mar. 31, 2014 Subsidiaries General and Professional Liability Insurance Policies Minimum	Mar. 31, 2014 Subsidiaries General and Professional Liability Insurance Policies Maximum	Mar. 31, 2014 Psychiatric Solutions Inc General and Professional Liability Insurance Policies Maximum	Oct. 30, 2012 Behavioral Health Facilities Acquired from Ascend Health Corporation General and Professional Liability Insurance Policies	Oct. 30, 2012 Behavioral Health Facilities Acquired from Ascend Health Corporation General and Professional Liability Insurance Policies Maximum
Commitments and Contingencies Disclosure [Line Items]
Self-insured for professional and general liability	$ 206,000,000	$ 206,000,000																	$ 10,000,000	$ 3,000,000				$ 3,000,000		$ 20,000,000
Purchased several excess policies through commercial insurance carriers per occurrence																							250,000,000			250,000,000
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					250,000													25,000
Self-insured for professional and general liability, current	44,000,000	44,000,000
Compensation liability claims	65,000,000	64,000,000
Compensation and related benefits	34,000,000	34,000,000
Commercial property insurance policies covering catastrophic losses											1,000,000,000		250,000,000		100,000,000	25,000,000
Percentage of insurance deductible										3.00%	5.00%			1.00%	5.00%
Maximum insurance deductible																25,000	250,000	500,000
Accounts receivable, net	1,212,594,000	1,116,961,000						39,000,000	49,000,000
Accounts receivable net greater than sixty days Past due								14,000,000	28,000,000
Accounts receivable								40,000,000	46,000,000
Off-balance sheet contingent obligation			$ 90,000,000	$ 73,000,000	$ 17,000,000