Commitments and Contingencies Level 4 (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Loss Contingencies [Line Items]
Operating Leases, Rent Expense	$ 33,300	$ 37,200	$ 28,400
Operating Leases, Future Minimum Payments Due, Current	14,496
Operating Leases, Future Minimum Payments, Due in Two Years	12,110
Operating Leases, Future Minimum Payments, Due in Three Years	10,545
Operating Leases, Future Minimum Payments, Due in Four Years	8,641
Operating Leases, Future Minimum Payments, Due in Five Years	7,167
Operating Leases, Future Minimum Payments, Due Thereafter	61,010
Operating Leases, Future Minimum Payments Due	113,969
Capital Leases, Future Minimum Payments Due, Current	34,415
Capital Leases, Future Minimum Payments Due in Two Years	51,756
Capital Leases, Future Minimum Payments Due in Three Years	46,290
Capital Leases, Future Minimum Payments Due in Four Years	21,499
Capital Leases, Future Minimum Payments Due in Five Years	24,010
Capital Leases, Future Minimum Payments Due Thereafter	26,276
Capital Leases, Future Minimum Payments Due	204,246
Capital Leases, Future Minimum Payments, Interest Included in Payments	(17,396)
Capital Leases, Future Minimum Payments, Net Minimum Payments	186,850
Agreements, Future Payments, Due in One Year	6,767
Agreements, Future Payments, Due in Two Years	5,534
Agreements, Future Payments, Due in Three Years	4,798
Agreements, Future Payments, Due in Four Years	4,398
Agreements, Future Payments, Due in Five Years	2,964
Agreements, Future Payments, Due in Six Years and Thereafter	6,068
Agreements, Future Payments Due	30,529
Self Insurance Reserve	76,600	$ 74,000
Employment Agreement [Member]
Loss Contingencies [Line Items]
Agreements, Future Payments, Due in One Year	1,427
Agreements, Future Payments, Due in Two Years	988
Agreements, Future Payments, Due in Three Years	508
Agreements, Future Payments, Due in Four Years	301
Agreements, Future Payments, Due in Five Years	22
Agreements, Future Payments, Due in Six Years and Thereafter	8
Agreements, Future Payments Due	3,254
Consulting Agreement [Member]
Loss Contingencies [Line Items]
Agreements, Future Payments, Due in One Year	589
Agreements, Future Payments, Due in Two Years	194
Agreements, Future Payments, Due in Three Years	124
Agreements, Future Payments, Due in Four Years	75
Agreements, Future Payments, Due in Five Years	38
Agreements, Future Payments, Due in Six Years and Thereafter	0
Agreements, Future Payments Due	1,020
Noncompete Agreements [Member]
Loss Contingencies [Line Items]
Agreements, Future Payments, Due in One Year	4,751
Agreements, Future Payments, Due in Two Years	4,352
Agreements, Future Payments, Due in Three Years	4,166
Agreements, Future Payments, Due in Four Years	4,022
Agreements, Future Payments, Due in Five Years	2,904
Agreements, Future Payments, Due in Six Years and Thereafter	6,060
Agreements, Future Payments Due	$ 26,255
Minimum [Member]
Loss Contingencies [Line Items]
Management, consulting and non-compete agreement term	5 years
Maximum [Member]
Loss Contingencies [Line Items]
Management, consulting and non-compete agreement term	10 years