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Income Taxes (Reconciliation Of Actual To Expected Tax Expense) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Income Taxes [Abstract]                      
Computed "expected" income tax expense                 $ 6,864 $ 5,695 $ 4,545
State income taxes, net                 803 486 426
Low income housing credits                 (896) (879) (841)
Other                 (617) (429) (212)
Total $ 1,588 $ 1,991 $ 1,551 $ 1,026 $ 1,516 $ 1,125 $ 1,198 $ 1,034 $ 6,156 $ 4,873 $ 3,918