Income Taxes - Income Tax Provision Benefit (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Deferred
Federal	$ 30,197	$ (7,516)	$ (8,196)
State	5,796	2,217	(1,847)
Total deferred provision	35,993	(5,299)	(10,043)
Total	$ 35,993	$ (5,299)	$ (10,043)