Income Taxes - Income Tax Benefit (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current taxes:
U.S. Federal	$ 8,150	$ (47,916)	$ (2,595)
State	584	(12,226)	679
Foreign	3,086	4,310	2,004
Total current tax expense (benefit)	11,820	(55,832)	88
Deferred taxes:
U.S. Federal	(16,129)	(25,017)	(9,679)
State	(780)	3,009	(6,406)
Deferred tax valuation allowance	(3,565)	710	1,882
Foreign	(2,303)	(1,896)	(1,323)
Total deferred tax benefit	(22,777)	(23,194)	(15,526)
Total income tax benefit	$ (10,957)	$ (79,026)	$ (15,438)