v3.26.1
Bank Loans (Activity in the Allowance for Credit Losses on Loans by Portfolio Segment) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Financing Receivable Allowance For Credit Losses [Line Items]        
Beginning Balance $ 115,178 $ 140,061 $ 132,245 $ 139,308
Provision 11,645 7,857 19,332 20,408
Charge-offs (12,899) (12,185) (37,654) (23,991)
Recoveries 6,761 1 6,762 9
Ending Balance 120,685 135,734 120,685 135,734
Commercial and Industrial [Member]        
Financing Receivable Allowance For Credit Losses [Line Items]        
Beginning Balance 76,781 92,294 92,612 92,698
Provision 15,171 4,872 24,095 16,274
Charge-offs (12,899) (12,185) (37,654) (23,991)
Ending Balance 79,053 84,981 79,053 84,981
Residential Real Estate [Member]        
Financing Receivable Allowance For Credit Losses [Line Items]        
Beginning Balance 10,988 11,172 11,264 11,061
Provision 1,401 2,595 1,125 2,706
Ending Balance 12,389 13,767 12,389 13,767
Construction And Land [Member]        
Financing Receivable Allowance For Credit Losses [Line Items]        
Beginning Balance 10,295 13,251 10,567 12,866
Provision (6,368) (397) (6,640) (12)
Recoveries 6,760   6,760  
Ending Balance 10,687 12,854 10,687 12,854
Fund Banking [Member]        
Financing Receivable Allowance For Credit Losses [Line Items]        
Beginning Balance 7,475 10,246 8,193 10,792
Provision 1,334 702 616 156
Ending Balance 8,809 10,948 8,809 10,948
Commercial Real Estate [Member]        
Financing Receivable Allowance For Credit Losses [Line Items]        
Beginning Balance 5,651 9,366 5,650 8,057
Provision (732) (571) (731) 738
Ending Balance 4,919 8,795 4,919 8,795
Securities-Based Loans [Member]        
Financing Receivable Allowance For Credit Losses [Line Items]        
Beginning Balance 3,300 2,928 3,254 2,917
Provision 209 200 255 211
Ending Balance 3,509 3,128 3,509 3,128
Home Equity Lines Of Credit [Member]        
Financing Receivable Allowance For Credit Losses [Line Items]        
Beginning Balance 120 170 134 317
Provision 620 490 606 343
Ending Balance 740 660 740 660
Other [Member]        
Financing Receivable Allowance For Credit Losses [Line Items]        
Beginning Balance 568 634 571 600
Provision 10 (34) 6 (8)
Recoveries 1 1 2 9
Ending Balance $ 579 $ 601 $ 579 $ 601