Income Taxes - Schedule of Activity in Valuation Allowance on Deferred Tax Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Deferred Tax Assets, Valuation Allowance [Roll Forward]
Balance at beginning of year	$ 2,999	$ 3,096
Increases (reductions) related to prior year tax positions (1)	(52,230)	33,858	$ (1,571)
Charges to income tax expense	38,500	0
Deductions	0	(97)
Balance at end of year	$ 41,499	$ 2,999	$ 3,096