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Investment Securities (Schedule Of Unrealized Loss On Securities) (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Schedule of Investments [Line Items]    
Securities Available-for-Sale, Less than 12 months, Fair value $ 1,147,114 $ 767,401
Securities Available-for-Sale, Less than 12 months, Unrealized losses 36,407 6,422
Securities Available-for-Sale, 12 months or longer, Fair value 149,376 73,431
Securities Available-for-Sale, 12 months or longer, Unrealized losses 15,284 3,092
Securities Available-for-Sale, Fair value, Total 1,296,490 840,832
Securities Available-for-Sale, Unrealized losses, Total 51,691 9,514
US States and Political Subdivisions Debt Securities [Member]    
Schedule of Investments [Line Items]    
Securities Available-for-Sale, Less than 12 months, Fair value 91,029 1,834
Securities Available-for-Sale, Less than 12 months, Unrealized losses 9,032 24
Securities Available-for-Sale, Fair value, Total 91,029 1,834
Securities Available-for-Sale, Unrealized losses, Total 9,032 24
U.S. Government Sponsored Entities Asset-Backed Securities [Member]    
Schedule of Investments [Line Items]    
Securities Available-for-Sale, Less than 12 months, Fair value 532,506 333,653
Securities Available-for-Sale, Less than 12 months, Unrealized losses 21,675 4,996
Securities Available-for-Sale, 12 months or longer, Fair value 149,376 73,431
Securities Available-for-Sale, 12 months or longer, Unrealized losses 15,284 3,092
Securities Available-for-Sale, Fair value, Total 681,882 407,084
Securities Available-for-Sale, Unrealized losses, Total 36,959 8,088
Collateralized Loan Obligations    
Schedule of Investments [Line Items]    
Securities Available-for-Sale, Less than 12 months, Fair value 494,917 429,671
Securities Available-for-Sale, Less than 12 months, Unrealized losses 5,112 1,395
Securities Available-for-Sale, Fair value, Total 494,917 429,671
Securities Available-for-Sale, Unrealized losses, Total 5,112 1,395
US Government Corporations and Agencies Securities    
Schedule of Investments [Line Items]    
Securities Available-for-Sale, Less than 12 months, Fair value 24,562  
Securities Available-for-Sale, Less than 12 months, Unrealized losses 438  
Securities Available-for-Sale, Fair value, Total 24,562  
Securities Available-for-Sale, Unrealized losses, Total 438  
Corporate Debt Securities    
Schedule of Investments [Line Items]    
Securities Available-for-Sale, Less than 12 months, Fair value 4,100 2,243
Securities Available-for-Sale, Less than 12 months, Unrealized losses 150 7
Securities Available-for-Sale, Fair value, Total 4,100 2,243
Securities Available-for-Sale, Unrealized losses, Total $ 150 $ 7