Provision (Benefit) for Income Taxes (Detail) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Federal:
Current	$ 488,031,000	$ 518,309,000	$ 181,578,000
Deferred	14,333,000	4,170,000	7,977,000
Federal Income Tax Expense (Benefit), Continuing Operations, Total	502,364,000	522,479,000	189,555,000
State:
Current	70,676,000	49,488,000	13,114,000
Deferred	(45,272,000)	(20,419,000)	13,419,000
State and Local Income Tax Expense (Benefit), Continuing Operations, Total	25,404,000	29,069,000	26,533,000
Foreign:
Current	101,101,000	120,287,000	30,885,000
Deferred	11,516,000	(33,538,000)	5,802,000
Foreign Income Tax Expense (Benefit), Continuing Operations, Total	112,617,000	86,749,000	36,687,000
Total provision for income taxes	$ 640,385,000	$ 638,297,000	$ 252,775,000