Segment Information Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Segment Reporting Information
Adjustment to self insurance reserves	$ (26,900)	$ 84,500	$ (26,900)	$ 84,500
Loss on debt retirements	$ 0	0	$ 0	8,584
Loss Contingency Accrual, Period Increase (Decrease)				(18,600)
Home Office Relocation [Member]
Segment Reporting Information
Restructuring and Related Cost, Incurred Cost		$ 3,700		$ 5,700