Commitments and Contingencies (Details) $ in Thousands	Jun. 30, 2015 USD ($)	Dec. 31, 2014 USD ($)
Other Commitments [Line Items]
Workers' Compensation and Medical Malpractice Receivable, Current	$ 13,664	$ 13,370
Self Insurance Reserve	1,600	2,200
Letters of Credit Outstanding, Amount	3,700	3,200
Contingent consideration maximum	41,000
Operating Leases, Future Minimum Payments Due	10,400
Liability for Uncertain Tax Positions, Noncurrent	900	900
Other current liabilities	$ 43,416	$ 20,729
Number of Leased Properties Owned by Related Parties	2