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Income Tax Provision (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Income Taxes [Line Items]      
Current tax provision, Federal $ 62,859 $ 50,780 $ 60,882
Current tax provision, State 10,537 9,335 10,246
Current tax provision, Foreign (103)    
Total current provision 73,293 60,115 71,128
Deferred tax provision, Federal 2,529 12,983 (545)
Deferred tax provision, State 438 1,537 451
Deferred tax provision, Foreign (1,907)    
Total deferred provision (benefit) 1,060 14,520 (94)
Total income tax provision $ 74,353 $ 74,635 $ 71,034