Income Taxes Provision for Income Tax (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Federal	$ 57,605	$ 60,826	$ 39,576
State	6,933	7,164	8,947
Foreign	41	11	0
Total current provision	64,579	68,001	48,523
Federal	9,391	(9,855)	16,037
State	2,644	(2,216)	(1,202)
Foreign	(47)	0	0
Total deferred (benefit) provision	11,988	(12,071)	14,835
Total provision	$ 76,567	$ 55,930	$ 63,358