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Accumulated Other Comprehensive Income (Summary Of Changes In Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Beginning balance $ 1,187  
Other comprehensive income 3,932 $ 6,207
Ending balance 5,119 1,187
Unrealized gains and losses on available-for-sale securities [Member]    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Beginning balance 354 (5,558)
Other comprehensive income (loss) before reclassification 3,798 6,113
Amount reclassified from accumulated other comprehensive (income) loss (56) (201)
Other comprehensive income 3,742 5,912
Ending balance 4,096 354
Unrealized gain (loss) on pension liability [Member]    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Beginning balance 833 538
Other comprehensive income (loss) before reclassification 190 295
Other comprehensive income 190 295
Ending balance 1,023 833
Accumulated Other Comprehensive Income (Loss) [Member]    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Beginning balance 1,187 (5,020)
Other comprehensive income (loss) before reclassification 3,988 6,408
Amount reclassified from accumulated other comprehensive (income) loss (56) (201)
Other comprehensive income 3,932 6,207
Ending balance $ 5,119 $ 1,187