Income Taxes - Schedule of Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current
U.S. federal	$ 2	$ 261	$ 0
State	37	(38)	(254)
Foreign	(1,914)	(245)	(241)
Total Current	(1,875)	(22)	(495)
Deferred
U.S. federal	3,803	13,028	5,403
State	146	0	(280)
Foreign	(23,360)	(21,659)	(6,079)
Total Deferred	(19,411)	(8,631)	(956)
Changes in valuation allowance	(3,950)	(13,028)	(3,613)
Income tax (expense) benefit	$ (25,236)	$ (21,681)	$ (5,064)