Income Taxes - Benefit From (Provision) Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current:
Federal	$ 0	$ (5)	$ 1,494
State	(36)	(187)	(151)
Foreign	(34)	(216)	44
Total current	(70)	(408)	1,387
Deferred:
Federal	0	28,011	780
State	0	2,140	142
Foreign	0	0	0
Total deferred	0	30,151	922
Total (provision for) benefit from taxes	$ (70)	$ 29,743	$ 2,309