Income Taxes - Schedule of Provision for Benefit from Income Taxes from Operations (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Current taxes
Federal	$ (1,961)	$ 2,216	$ 5,047
State	64	(1,112)	(1,680)
Foreign	14,292	10,203	12,536
Total current taxes	12,395	11,307	15,903
Deferred taxes and other
Federal	11,662	(24,411)	(7,287)
State	3,388	(1,723)	564
Foreign	3,976	4,079	4,821
Total deferred taxes and other	19,026	(22,055)	(1,902)
Income tax provision (benefit)	$ 31,421	$ (10,748)	$ 14,001