Income Taxes - Components of Income Taxes (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Taxes Disclosure [Abstract]
Current income taxes, Federal	$ 72,909	$ 62,886	$ 45,817
Current income taxes, State	7,369	4,551	2,578
Current income taxes, Foreign	46,026	29,551	17,375
Total current	126,304	96,988	65,770
Deferred income taxes, Federal	(1,287)	2,295	1,538
Deferred income taxes, State	130	417	132
Deferred income taxes, Foreign	(6,079)	(5,109)	(3,898)
Total deferred	(7,236)	(2,397)	(2,228)
Total provision	$ 119,068	$ 94,591	$ 63,542