Detail of Certain Balance Sheet Accounts (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011
Property and equipment
Gross property and equipment	$ 127,121				$ 93,514
Less accumulated depreciation and amortization	30,091				8,621
Net property and equipment	97,030	97,976	98,979	100,980	84,893
Other assets
Long-term receivables and advances to managed facilities	2,621				2,878
Deposits	3,904				3,959
Deferred debt issuance costs	11,498				12,279
Insurance recoveries	7,193				6,334
Other assets	1,938				2,208
Total	27,154				27,658
Accrued expenses
Wages and payroll taxes	43,824				45,400
Compensated absences	18,025				16,538
Health insurance	7,199				9,195
Workers' compensation insurance	14,154				14,219
Automobile insurance	1,869				4,081
Professional services	2,312				3,069
General and professional liability insurance	1,679				2,299
Taxes other than income taxes	9,696				10,284
Interest	10,962				11,460
Deferred revenue	1,045				1,456
Other	4,111				4,631
Total	114,876				122,632
Long-term liabilities
Workers' compensation insurance	26,090				26,218
Automobile insurance	3,638				3,074
General and professional liability insurance	24,054				23,060
Unfavorable leases	1,317				2,198
Other	1,220				650
Total	56,319				55,200
Land and land improvements
Property and equipment
Gross property and equipment	6,879				7,002
Furniture and equipment
Property and equipment
Gross property and equipment	51,359				43,451
Buildings
Property and equipment
Gross property and equipment	26,298				26,927
Leasehold improvements
Property and equipment
Gross property and equipment	15,285				13,135
Vehicles under capital lease
Property and equipment
Gross property and equipment	23,286
Buildings under capital lease
Property and equipment
Gross property and equipment	1,252				1,252
Equipment under capital lease
Property and equipment
Gross property and equipment	472				472
Construction in progress
Property and equipment
Gross property and equipment	$ 2,290				$ 1,275