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Components of Income Tax Expense (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Operating Loss Carryforwards [Line Items]      
Current $ 168,320 $ 150,800 $ 123,241
Deferred (1,453) (11,552) (11,674)
Income Tax Expense (Benefit), Total 166,867 139,248 111,567
Domestic 152,040 134,242 110,318
Foreign 14,827 5,006 1,249
Domestic and foreign tax expense total 166,867 139,248 111,567
State taxes, Current 152,453 138,686 112,475
State taxes, Deferred (413) (4,444) (2,157)
State tax expense (Benefit) 152,040 134,242 110,318
Total foreign taxes 14,827 5,006 1,249
Taxes on income 166,867 139,248 111,567
Foreign Tax Authority
      
Operating Loss Carryforwards [Line Items]      
Federal taxes, Current 10,725 7,809 6,608
Federal taxes, Deferred (244) 748 (792)
Federal Income Tax Expense (Benefit) 10,481 8,557 5,816
State taxes, Current 1,995 1,061 1,243
State taxes, Deferred (111) 819 (52)
State tax expense (Benefit) 1,884 1,880 1,191
Other international locations, Current 3,149 3,245 2,915
Other international locations, Deferred (687) (8,676) (8,673)
Other international locations tax expense total $ 2,462 $ (5,431) $ (5,758)