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Accumulated Other Comprehensive Income (Loss) (Summary Of Changes In Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Beginning balance $ (5,020)  
Other comprehensive income (loss) 6,207 $ (2,353)
Ending balance 1,187 (5,020)
Unrealized gains and losses on available-for-sale securities [Member]    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Beginning balance (5,558) (3,041)
Other comprehensive income (loss) before reclassification 6,113 (2,349)
Amount reclassified from accumulated other comprehensive loss (201) (168)
Other comprehensive income (loss) 5,912 (2,517)
Ending balance 354 (5,558)
Unrealized gain (loss) on pension liability [Member]    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Beginning balance 538 374
Other comprehensive income (loss) before reclassification 295 164
Other comprehensive income (loss) 295 164
Ending balance 833 538
Accumulated Other Comprehensive Income (Loss) [Member]    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Beginning balance (5,020) (2,667)
Other comprehensive income (loss) before reclassification 6,408 (2,185)
Amount reclassified from accumulated other comprehensive loss (201) (168)
Other comprehensive income (loss) 6,207 (2,353)
Ending balance $ 1,187 $ (5,020)