Income Taxes - Components of Income Tax Expense (Benefit) Table (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014		Dec. 31, 2013
Current income tax expense (benefit)
Federal income tax expense (benefit)	$ 590	$ (1,729)		$ (35,917)
State income tax expense (benefit)	858	63		493
Total current income tax expense (benefit)	1,448	(1,666)		(35,424)
Deferred income tax expense (benefit)
Federal income tax expense (benefit)	348	10,612		40,846
State income tax expense (benefit)	1,584	2,713		(811)
Total deferred income tax expense (benefit)	1,932	13,325	[1]	40,035	[1]
Total income tax expense (benefit)	$ 3,380	$ 11,659	[1]	$ 4,611	[1]

[1] Financial information has been recast to include the financial position and results attributable to the DBJV system. See Note 1 and Note 2.