Components of Provision for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current:
Federal	$ 77,777	$ 51,399	$ 48,905
State	7,972	4,487	5,954
Foreign	8,002	7,519	7,321
Current income tax provision	93,751	63,405	62,180
Deferred:
Federal	(10,065)	38,879	9,559
State	(1,932)	2,958	2,637
Foreign	(1,281)	(3,081)	(5,071)
Deferred income tax (benefit) provision	(13,278)	38,756	7,125
Provision for income taxes	$ 80,473	$ 102,161	$ 69,305