v3.26.1
Goodwill and Intangible Assets (Carrying Amount of Goodwill and Intangible Assets) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Schedule of Goodwill and Intangible Assets [Line Items]    
Goodwill, Beginning balance $ 1,463,858  
Goodwill, Ending balance 1,463,858  
Intangible assets, Beginning balance 108,045  
Intangible assets, Adjustments (57)  
Intangible assets, Amortization (10,548) $ (5,396)
Intangible assets, Ending balance 97,440  
Global Wealth Management [Member]    
Schedule of Goodwill and Intangible Assets [Line Items]    
Goodwill, Beginning balance 351,708  
Goodwill, Ending balance 351,708  
Intangible assets, Beginning balance 26,287  
Intangible assets, Amortization (972)  
Intangible assets, Ending balance 25,315  
Institutional Group [Member]    
Schedule of Goodwill and Intangible Assets [Line Items]    
Goodwill, Beginning balance 1,112,150  
Goodwill, Ending balance 1,112,150  
Intangible assets, Beginning balance 81,758  
Intangible assets, Adjustments (57)  
Intangible assets, Amortization (9,576)  
Intangible assets, Ending balance $ 72,125