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Investment Securities (Schedule Of Unrealized Loss On Securities) (Details) - USD ($)
$ in Thousands
Sep. 30, 2024
Dec. 31, 2023
Schedule of Investments [Line Items]    
Securities Available-for-Sale, Less than 12 months, Fair value $ 91,769 $ 56,215
Securities Available-for-Sale, Less than 12 months, Unrealized losses 352 1,122
Securities Available-for-Sale, 12 months or longer, Fair value 787,522 1,150,640
Securities Available-for-Sale, 12 months or longer, Unrealized losses 63,331 86,033
Securities Available-for-Sale, Fair value, Total 879,291 1,206,855
Securities Available-for-Sale, Unrealized losses, Total 63,683 87,155
US States and Political Subdivisions Debt Securities [Member]    
Schedule of Investments [Line Items]    
Securities Available-for-Sale, Less than 12 months, Fair value 23,999 46,685
Securities Available-for-Sale, Less than 12 months, Unrealized losses 312 420
Securities Available-for-Sale, 12 months or longer, Fair value 144,936 103,993
Securities Available-for-Sale, 12 months or longer, Unrealized losses 13,050 11,100
Securities Available-for-Sale, Fair value, Total 168,935 150,678
Securities Available-for-Sale, Unrealized losses, Total 13,362 11,520
U.S. Government Sponsored Entities Asset-Backed Securities [Member]    
Schedule of Investments [Line Items]    
Securities Available-for-Sale, 12 months or longer, Fair value 553,361 634,261
Securities Available-for-Sale, 12 months or longer, Unrealized losses 48,187 68,193
Securities Available-for-Sale, Fair value, Total 553,361 634,261
Securities Available-for-Sale, Unrealized losses, Total 48,187 68,193
Collateralized Loan Obligations    
Schedule of Investments [Line Items]    
Securities Available-for-Sale, Less than 12 months, Fair value 66,578  
Securities Available-for-Sale, Less than 12 months, Unrealized losses 22  
Securities Available-for-Sale, 12 months or longer, Fair value 73,616 404,019
Securities Available-for-Sale, 12 months or longer, Unrealized losses 53 4,857
Securities Available-for-Sale, Fair value, Total 140,194 404,019
Securities Available-for-Sale, Unrealized losses, Total 75 4,857
Corporate Debt Securities    
Schedule of Investments [Line Items]    
Securities Available-for-Sale, Less than 12 months, Fair value 944 9,530
Securities Available-for-Sale, Less than 12 months, Unrealized losses 16 702
Securities Available-for-Sale, 12 months or longer, Fair value 15,609 8,367
Securities Available-for-Sale, 12 months or longer, Unrealized losses 2,041 1,883
Securities Available-for-Sale, Fair value, Total 16,553 17,897
Securities Available-for-Sale, Unrealized losses, Total 2,057 $ 2,585
US Government Corporations and Agencies Securities    
Schedule of Investments [Line Items]    
Securities Available-for-Sale, Less than 12 months, Fair value 248  
Securities Available-for-Sale, Less than 12 months, Unrealized losses 2  
Securities Available-for-Sale, Fair value, Total 248  
Securities Available-for-Sale, Unrealized losses, Total $ 2