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Accumulated Other Comprehensive Income (Loss) (Summary Of Changes In Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Beginning balance $ (256)  
Other comprehensive loss (23,469) $ (3,098)
Ending balance (23,725)  
Accumulated Other Comprehensive Income (Loss) [Member]    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Other comprehensive loss (23,469) (3,098)
Amount Reclassified From Accumulated Other Comprehensive Income (Loss) [Member] | Unrealized gains and losses on available-for-sale securities [Member]    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Beginning balance (256) 5,119
Other comprehensive income (loss) before reclassification (23,469) (3,081)
Amount reclassified from accumulated other comprehensive (income) loss   (17)
Other comprehensive loss (23,469) (3,098)
Ending balance $ (23,725) $ 2,021