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Goodwill And Other Intangible Assets (Summary of Core Deposit, Customer Relationship and Other Intangibles) (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Finite Lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 69,722 $ 69,722
Accumulated Amortization 28,727 23,826
Net Carrying Value 40,995 45,896
Core Deposit Intangibles [Member]    
Finite Lived Intangible Assets [Line Items]    
Gross Carrying Amount 51,402 51,402
Accumulated Amortization 20,096 16,419
Net Carrying Value 31,306 34,983
Customer Relationship Intangibles [Member]    
Finite Lived Intangible Assets [Line Items]    
Gross Carrying Amount 17,753 17,753
Accumulated Amortization 8,254 7,124
Net Carrying Value 9,499 10,629
Other Intangible Assets [Member]    
Finite Lived Intangible Assets [Line Items]    
Gross Carrying Amount 567 567
Accumulated Amortization 377 283
Net Carrying Value $ 190 $ 284