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Income Taxes (Income Tax Expense (Benefit)) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Federal tax expense (benefit):      
Current $ 12,493 $ 10,081 $ 8,319
Deferred (2,758) (1,876) (2,257)
Federal tax expense (benefit) 9,735 8,205 6,062
State and local tax expense (benefit):      
Current 2,276 1,568 1,061
Deferred (1,275) (857) (626)
State and local tax expense (benefit) 1,001 711 435
Total income tax expense $ 10,736 $ 8,916 $ 6,497