Significant Components of Income Tax Expense (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Current
United States-federal	$ 95,864	$ 99,481	$ 72,733
United States-state and local	14,034	10,205	9,356
International	17,192	11,906	15,864
Current Income Tax Expense (Benefit), Total	127,090	121,592	97,953
Deferred
United States-federal	25,028	7,690	19,834
United States-state and local	3,881	2,589	3,254
International	(8,743)	3,110	355
Deferred Income Tax Expense (Benefit), Total	20,166	13,389	23,443
Total provision	$ 147,256	$ 134,981	$ 121,396