Income Taxes - Summary of Components of Income Tax Provision from Continuing Operations (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current
Federal									$ 10,847	$ 15,164	$ (3,326)
State									4,447	742	1,686
Foreign									21,056	14,816	13,864
Current, Total									36,350	30,722	12,224
Deferred
Federal									14,538	(47,820)	23,182
State									503	(152)	8,284
Foreign									5,790	(3,607)	(1,407)
Deferred, Total									20,831	(51,579)	30,059
Income tax provision (benefit)	$ 7,834	$ 19,964	$ 14,113	$ 15,270	$ (38,458)	$ 9,197	$ 527	$ 7,877	$ 57,181	$ (20,857)	$ 42,283