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Significant Components of Provision for Income Taxes (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Income Tax Disclosure [Abstract]      
Current, Federal $ 94,007 $ 75,522 $ 65,461
Current, State 13,438 11,852 10,084
Current, Foreign 805 669 638
Total current provision 108,250 88,043 76,183
Deferred, Federal 28,469 27,348 27,212
Deferred, State 3,723 5,375 3,131
Deferred, Foreign 55      
Total deferred provision 32,247 32,723 30,343
Total tax provision $ 140,497 $ 120,766 $ 106,526