Significant Components of Income Tax Expense (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Current
United States-federal	$ 99,481	$ 72,733	$ 60,493
United States-state and local	10,205	9,356	8,938
International	11,906	15,864	9,895
Current Income Tax Expense (Benefit), Total	121,592	97,953	79,326
Deferred
United States-federal	7,690	19,834	16,046
United States-state and local	2,589	3,254	2,636
International	3,110	355	3,291
Deferred Income Tax Expense (Benefit), Total	13,389	23,443	21,973
Income Tax Expense	$ 134,981	$ 121,396	$ 101,299