Components of Provision for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current:
Federal	$ 27,805	$ 77,777	$ 51,399
State	(577)	7,972	4,487
Foreign	6,327	8,002	7,519
Current income tax provision	33,555	93,751	63,405
Deferred:
Federal	42,964	(10,065)	38,879
State	3,445	(1,932)	2,958
Foreign	(1,398)	(1,281)	(3,081)
Deferred income tax provision (benefit)	45,011	(13,278)	38,756
Provision for income taxes	$ 78,566	$ 80,473	$ 102,161