Income Taxes - Summary of (Provision) Benefit from Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current
Federal	$ (15,296)	$ (13,284)	$ (12,156)
State	(3,350)	(2,691)	(1,132)
Deferred
Federal	(5,259)	(4,748)	74,000
State	(2,901)	(3,074)	21,590
(Provision) benefit from income taxes	$ (26,806)	$ (23,797)	$ 82,302