v3.26.3
Bank Loans (Activity in the Allowance for Credit Losses on Loans by Portfolio Segment) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Financing Receivable Allowance For Credit Losses [Line Items]        
Beginning Balance $ 120,685 $ 135,734 $ 132,245 $ 139,308
Provision 7,315 8,808 26,647 29,216
Charge-offs (14,980) (10,529) (52,634) (34,520)
Recoveries 127 9 6,889 18
Ending Balance 113,147 134,022 113,147 134,022
Commercial and Industrial [Member]        
Financing Receivable Allowance For Credit Losses [Line Items]        
Beginning Balance 79,053 84,981 92,612 92,698
Provision 12,268 11,378 36,363 27,652
Charge-offs (14,980) (10,529) (52,634) (34,520)
Recoveries 126   126  
Ending Balance 76,467 85,830 76,467 85,830
Residential Real Estate [Member]        
Financing Receivable Allowance For Credit Losses [Line Items]        
Beginning Balance 12,389 13,767 11,264 11,061
Provision (2,095) (1,258) (970) 1,448
Ending Balance 10,294 12,509 10,294 12,509
Construction And Land [Member]        
Financing Receivable Allowance For Credit Losses [Line Items]        
Beginning Balance 10,687 12,854 10,567 12,866
Provision (4,137) (629) (10,777) (641)
Recoveries 0   6,760  
Ending Balance 6,550 12,225 6,550 12,225
Fund Banking [Member]        
Financing Receivable Allowance For Credit Losses [Line Items]        
Beginning Balance 8,809 10,948 8,193 10,792
Provision 1,176 (132) 1,792 24
Ending Balance 9,985 10,816 9,985 10,816
Commercial Real Estate [Member]        
Financing Receivable Allowance For Credit Losses [Line Items]        
Beginning Balance 4,919 8,795 5,650 8,057
Provision 855 (192) 124 546
Ending Balance 5,774 8,603 5,774 8,603
Securities-Based Loans [Member]        
Financing Receivable Allowance For Credit Losses [Line Items]        
Beginning Balance 3,509 3,128 3,254 2,917
Provision (370) 52 (115) 263
Ending Balance 3,139 3,180 3,139 3,180
Home Equity Lines Of Credit [Member]        
Financing Receivable Allowance For Credit Losses [Line Items]        
Beginning Balance 740 660 134 317
Provision (428) (417) 178 (74)
Ending Balance 312 243 312 243
Other [Member]        
Financing Receivable Allowance For Credit Losses [Line Items]        
Beginning Balance 579 601 571 600
Provision 46 6 52 (2)
Recoveries 1 9 3 18
Ending Balance $ 626 $ 616 $ 626 $ 616