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Goodwill and Intangible Assets (Intangible Assets) (Details) - USD ($)
$ in Thousands
Sep. 30, 2024
Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Value $ 306,221 $ 304,387
Accumulated Amortization 189,054 171,108
Customer Relationships [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Value 229,320 227,486
Accumulated Amortization 133,214 122,971
Trade Names [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Value 30,359 30,359
Accumulated Amortization 23,477 22,366
Acquired Technology [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Value 18,314 18,314
Accumulated Amortization 7,635 3,447
Non-Compete Agreements [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Value 10,700 10,700
Accumulated Amortization 9,314 8,421
Investment Banking Backlog [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Value 8,913 8,913
Accumulated Amortization 6,935 5,758
Core Deposits [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Value 8,615 8,615
Accumulated Amortization $ 8,479 $ 8,145