v3.24.0.1
Business Changes and Developments - Goodwill Associated with Acquisitions (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Goodwill [Roll Forward]      
Balance at beginning of period $ 123,285 $ 128,246  
Foreign Currency Translation and Other 2,208 (4,961)  
Balance at end of period 125,493 123,285  
Goodwill, Impaired, Accumulated Impairment Loss 38,528 38,528 $ 38,528
Goodwill, Gross 164,021 161,813 $ 166,774
Investment Banking and Equities [Member]      
Goodwill [Roll Forward]      
Balance at beginning of period 115,758 120,719  
Foreign Currency Translation and Other 2,208 (4,961)  
Balance at end of period 117,966 115,758  
Investment Management [Member]      
Goodwill [Roll Forward]      
Balance at beginning of period 7,527 7,527  
Foreign Currency Translation and Other 0 0  
Balance at end of period $ 7,527 $ 7,527