Income Taxes from Continuing Operations (Details) - Income Tax Provision - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current
Federal	$ 107,818	$ 116,375	$ 26,114
State	11,247	11,113	2,347
Foreign		0	4
Total	119,065	127,488	28,465
Deferred
Federal	(26,377)	(41,477)	(14,222)
State	(4,325)	(2,620)	(2,090)
Foreign	(1,306)	(2,033)	(1,199)
Total	(32,008)	(46,130)	(17,511)
Total
Federal	81,441	74,898	11,892
State	6,922	8,493	257
Foreign	(1,306)	(2,033)	(1,195)
Total income tax expense	$ 87,057	$ 81,358	$ 10,954