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Income Taxes (Schedule Of Difference Between Actual Income Tax Provision For Continuing Operations And Income Tax Provision Calculated At Statutory U.S. Federal Tax Rate) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Income Taxes [Abstract]      
Income tax provision calculated using the statutory rate of 35% $ 51,037 $ 49,195 $ 46,841
State and local income taxes, less federal income tax effect 4,601 4,733 4,509
Nondeductible expenses 1,137 1,062 976
Other --net (260) (413) (326)
Income taxes $ 56,515 $ 54,577 $ 52,000
Effective tax rate 38.80% 38.80% 38.90%
Statutory rate 35.00%