Income Taxes (Income Tax Expense from Cont. Ops) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current:
Federal	$ 83,228	$ 8,640	$ 7,895
State	14,268	4,396	3,598
Deferred:
Federal	11,715	27,505	31,509
State	4,579	7,562	5,652
Income tax expense	$ 113,790	$ 48,103	$ 48,654