Income Taxes (Components of Income Taxes) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Current:
Current income taxes, Federal	$ 62,886	$ 45,817	$ 31,337
Current income taxes, State	4,551	2,578	2,545
Current income taxes, Foreign	29,551	17,375	13,496
Total current	96,988	65,770	47,378
Deferred:
Deferred income taxes, Federal	2,295	1,538	(1,308)
Deferred income taxes, State	417	132	(93)
Deferred income taxes, Foreign	(5,109)	(3,898)	(2,593)
Total deferred	(2,397)	(2,228)	(3,994)
Total provision	$ 94,591	$ 63,542	$ 43,384