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Bank Loans (Risk Category Of Loan Portfolio) (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | $ 19,441,467 | $ 20,602,558
Pass [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 18,943,697 | 20,427,527
Special Mention [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 211,686 | 108,027
Substandard [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 284,000 | 56,899
Doubtful [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 2,084 | 10,105
Commercial and Industrial [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 3,566,987 | 4,897,176
Commercial and Industrial [Member] | Pass [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 3,294,891 | 4,743,290
Commercial and Industrial [Member] | Special Mention [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 89,302 | 87,761
Commercial and Industrial [Member] | Substandard [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 180,772 | 56,899
Commercial and Industrial [Member] | Doubtful [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 2,022 | 9,226
Fund Banking [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 3,633,126 | 4,182,641
Fund Banking [Member] | Pass [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 3,633,126 | 4,182,641
Residential Real Estate [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 8,047,647 | 7,371,671
Residential Real Estate [Member] | Pass [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 8,042,246 | 7,370,717
Residential Real Estate [Member] | Special Mention [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 1,456 | 266
Residential Real Estate [Member] | Substandard [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 3,945 | 0
Residential Real Estate [Member] | Doubtful [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio |  | 688
Securities-Based Loans [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 2,306,455 | 2,724,551
Securities-Based Loans [Member] | Pass [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 2,306,452 | 2,724,548
Securities-Based Loans [Member] | Doubtful [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 3 | 3
Construction And Land [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 1,034,370 | 593,191
Construction And Land [Member] | Pass [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 963,083 | 593,191
Construction And Land [Member] | Special Mention [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 71,287 | 0
Construction And Land [Member] | Substandard [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio |  | 0
Commercial Real Estate [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 660,631 | 675,599
Commercial Real Estate [Member] | Pass [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 512,171 | 655,599
Commercial Real Estate [Member] | Special Mention [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 49,264 | 20,000
Commercial Real Estate [Member] | Substandard [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 99,196 |
Commercial Real Estate [Member] | Doubtful [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio |  | 0
Home Equity Lines Of Credit [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 136,270 | 107,136
Home Equity Lines Of Credit [Member] | Pass [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 135,806 | 106,954
Home Equity Lines Of Credit [Member] | Special Mention [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 377 | 0
Home Equity Lines Of Credit [Member] | Substandard [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 87 |
Home Equity Lines Of Credit [Member] | Doubtful [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio |  | 182
Other [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 55,981 | 50,593
Other [Member] | Pass [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 55,922 | 50,587
Other [Member] | Doubtful [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | $ 59 | $ 6

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