XML 86 R58.htm IDEA: XBRL DOCUMENT v2.4.0.6
Income Taxes - Components of Income Tax Provision (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Components Of Income Tax Expense Benefit [Line Items]      
Federal, Current $ 111,940 $ 113,290 $ 73,756
Federal, Deferred 19,814 7,486 22,814
Federal income tax provision (benefit), Total 131,754 120,776 96,570
State, Current 13,980 13,895 10,330
State, Deferred 1,530 577 1,561
State income tax provision (benefit), Total 15,510 14,472 11,891
Income tax provision (benefit), Total $ 147,264 $ 135,248 $ 108,461