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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 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Beginning balance     $ (57,353)  
Other comprehensive loss $ (10,733) $ (20,335) (7,629) $ (60,309)
Ending balance (64,982)   (64,982)  
Accumulated Other Comprehensive Income (Loss) [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Other comprehensive loss (10,733) (20,335) (7,629) (60,309)
Amount Reclassified From Accumulated Other Comprehensive Income (Loss) [Member] | Unrealized Gains (Losses) On Available-For-Sale Securities [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Beginning balance (54,249) (40,230) (57,353) (256)
Other comprehensive loss before reclassification (10,733) (20,335) (7,794) (60,309)
Amount reclassified from accumulated other comprehensive (income) loss     165  
Other comprehensive loss (10,733) (20,335) (7,629) (60,309)
Ending balance $ (64,982) $ (60,565) $ (64,982) $ (60,565)