Income Taxes - Schedule of Income Tax Provision (Benefit) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current:
Federal	$ (24,366)	$ 20,435	$ 8,461
Foreign	9,163	(2,671)	15,246
Total current	(15,203)	17,764	23,707
Deferred:
Federal	0	20,592	1,121
Foreign	(4,091)	(3,361)	(2,181)
Total deferred	(4,091)	17,231	(1,060)
Total	$ (19,294)	$ 34,995	$ 22,647