Income Taxes Schedule of current and deferred income tax expense (benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current:
Federal	$ 8,452	$ 0
State	1,218	832
Total current	9,670	832
Deferred:
Federal	(13,070)	0
State	(1,768)	0
Total deferred	(14,838)	0
Total expense	$ (5,168)	$ 832	$ 100