Components of Provision for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current:
Federal	$ 211,017	$ 255,299	$ 167,690
State	16,609	20,438	12,942
Foreign	20,733	21,584	15,457
Deferred	(17,983)	(52,033)	(2,729)
Total provision for income taxes for continuing operations	$ 230,376	$ 245,288	$ 193,360