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Business Developments Changes and Developments - Intangible Assets Associated with Acquisitions (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 3,630 $ 3,630
Accumulated Amortization 3,294 2,932
Client Related [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 3,630 3,630
Accumulated Amortization 3,294 2,932
Investment Banking [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 0 0
Accumulated Amortization 0 0
Investment Banking [Member] | Client Related [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 0 0
Accumulated Amortization 0 0
Investment Management [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 3,630 3,630
Accumulated Amortization 3,294 2,932
Investment Management [Member] | Client Related [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 3,630 3,630
Accumulated Amortization $ 3,294 $ 2,932