Detail of Certain Balance Sheet Accounts (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Property and equipment
Gross property and equipment	$ 140,366	$ 127,121
Less accumulated depreciation and amortization	39,345	30,091
Net property and equipment	101,021	97,030
Other assets
Long-term receivables and advances to managed facilities	3,280	2,621
Deposits	3,981	3,904
Deferred debt issuance costs	9,085	11,498
Insurance recoveries	7,352	7,193
Other assets	1,484	1,938
Total	25,182	27,154
Accrued expenses
Wages and payroll taxes	46,878	43,824
Compensated absences	19,709	18,025
Health insurance	6,415	7,199
Workers' compensation insurance	14,740	14,154
Automobile insurance	1,960	1,869
Professional services	6,397	2,312
General and professional liability insurance	2,841	1,679
Taxes other than income taxes	6,125	9,696
Interest	10,852	10,962
Deferred revenue	956	1,045
Other	3,930	4,111
Total	120,803	114,876
Long-term liabilities
Workers' compensation insurance	26,945	26,090
Automobile insurance	3,680	3,638
General and professional liability insurance	5,635	24,054
Unfavorable leases	679	1,317
Other	2,204	1,370
Total	39,143	56,469
Land and land improvements
Property and equipment
Gross property and equipment	6,846	6,879
Furniture and equipment
Property and equipment
Gross property and equipment	50,744	51,359
Buildings
Property and equipment
Gross property and equipment	26,972	26,298
Leasehold improvements
Property and equipment
Gross property and equipment	18,192	15,285
Vehicles under capital lease
Property and equipment
Gross property and equipment	30,967	23,017
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	278	472
Software under capital lease
Property and equipment
Gross property and equipment	269	269
Construction in progress
Property and equipment
Gross property and equipment	$ 4,846	$ 2,290