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Income Taxes (Schedule Of Components Of Income Tax Expense) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Income Tax Disclosure [Abstract]      
Current income tax expense $ 31,873 $ 25,060 $ 33,609
Deferred income tax (benefit) expense (9,057) 7,419 9,113
Income tax expense $ 22,816 $ 32,479 $ 42,722