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Goodwill and Intangible Assets (Intangible Assets) (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Value $ 299,310 $ 285,293
Accumulated Amortization 188,929 171,719
Customer Relationships [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Value 222,618 208,601
Accumulated Amortization 126,088 115,919
Trade Names [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Value 29,109 29,109
Accumulated Amortization 23,303 22,210
Acquired Technology [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Value 19,903 19,903
Accumulated Amortization 13,646 9,158
Non-Compete Agreements [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Value 10,152 10,152
Accumulated Amortization 8,881 8,559
Investment Banking Backlog [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Value 8,913 8,913
Accumulated Amortization 8,396 7,327
Core Deposits [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Value 8,615 8,615
Accumulated Amortization $ 8,615 $ 8,546