Income Taxes - Components of Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Current income taxes, Federal	$ 82,926	$ 39,168	$ 72,909
Current income taxes, State	8,051	8,208	7,369
Current income taxes, Foreign	51,970	55,144	46,026
Total current	142,947	102,520	126,304
Deferred income taxes, Federal	36,723	41,814	(1,287)
Deferred income taxes, State	1,525	(596)	130
Deferred income taxes, Foreign	(7,622)	498	(6,079)
Total deferred	30,626	41,716	(7,236)
Provision for income taxes, amount	$ 173,573	$ 144,236	$ 119,068