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Goodwill and Intangible Assets (Carrying Amount Of Goodwill and Intangible Assets) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Schedule of Goodwill and Intangible Assets [Line Items]        
Goodwill, Beginning balance     $ 1,395,218  
Goodwill, Adjustments     87,124  
Goodwill, Ending balance $ 1,482,342   1,482,342  
Intangible assets, Beginning balance     113,574  
Intangible assets, Adjustments     13,406  
Intangible assets, Amortization (5,700) $ (5,900) (16,599) $ (17,710)
Intangible assets, Ending balance 110,381   110,381  
Global Wealth Management [Member]        
Schedule of Goodwill and Intangible Assets [Line Items]        
Goodwill, Beginning balance     335,009  
Goodwill, Adjustments     16,699  
Goodwill, Ending balance 351,708   351,708  
Intangible assets, Beginning balance     24,385  
Intangible assets, Adjustments     5,807  
Intangible assets, Amortization     (2,933)  
Intangible assets, Ending balance 27,259   27,259  
Institutional Group [Member]        
Schedule of Goodwill and Intangible Assets [Line Items]        
Goodwill, Beginning balance     1,060,209  
Goodwill, Adjustments     70,425  
Goodwill, Ending balance 1,130,634   1,130,634  
Intangible assets, Beginning balance     89,189  
Intangible assets, Adjustments     7,599  
Intangible assets, Amortization     (13,666)  
Intangible assets, Ending balance $ 83,122   $ 83,122