Income Taxes Income Taxes (Components of Income Tax) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current
Federal	$ (4,202)	$ 3,765	$ 5,358
State	405	1,150	915
Current income tax expense (benefit)	(3,797)	4,915	6,273
Deferred
Federal	(4,176)	(69,281)	0
State	(1,716)	(1,211)	0
Deferred income tax expense (benefit)	(5,892)	(70,492)	0
Income tax expense (benefit)	$ (9,689)	$ (65,577)	$ 6,273