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Reclassifications Out Of Accumulated Other Comprehensive Income (Summary Of Reclassifications Out Of Accumulated Other Comprehensive Income) (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]              
Net securities gains         $ 4,498 $ 1,334 $ 403
Salaries and benefits         (19,775) (17,884) (16,836)
Provision for income taxes $ 426 $ 1,850 $ 1,804 $ 1,796 5,876 5,967 5,914
Net income $ 2,584 $ 3,632 $ 4,311 $ 4,406 14,933 15,153 14,613
Total reclassification for the period         2,906 842 237
Reclassification Out Of Accumulated Other Comprehensive Income [Member] | Realized Gains And Losses On Available-For-Sale Securities [Member]              
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]              
Net securities gains         4,498 1,334 400
Provision for income taxes         (1,574) (467) (138)
Net income         2,924 867 262
Reclassification Out Of Accumulated Other Comprehensive Income [Member] | Amortization Of Prior Service Cost And Actuarial (Loss) Gain For Supplemental Executive Retirement Plan [Member]              
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]              
Salaries and benefits         (28) (38) (25)
Provision for income taxes         10 13  
Net income         $ (18) $ (25) $ (25)