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Bank Loans (Risk Category Of Loan Portfolio) (Details) - USD ($) $ in Thousands | Sep. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Financing Receivable Recorded Investment [Line Items] |  |
Gross bank loans | $ 20,819,250 | $ 16,743,487
Pass [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Gross bank loans | 20,579,965 | 16,553,018
Special Mention [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Gross bank loans | 146,919 | 54,817
Substandard [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Gross bank loans | 81,346 | 127,831
Doubtful [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Gross bank loans | 11,020 | 7,821
Residential Real Estate [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Gross bank loans | 7,048,762 | 5,482,026
Residential Real Estate [Member] | Pass [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Gross bank loans | 7,046,822 | 5,480,693
Residential Real Estate [Member] | Special Mention [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Gross bank loans | 150 |
Residential Real Estate [Member] | Substandard [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Gross bank loans | 0 | 84
Residential Real Estate [Member] | Doubtful [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Gross bank loans | 1,790 | 1,249
Commercial and Industrial [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Gross bank loans | 9,394,557 | 7,345,753
Commercial and Industrial [Member] | Pass [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Gross bank loans | 9,254,217 | 7,193,435
Commercial and Industrial [Member] | Special Mention [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Gross bank loans | 69,769 | 38,000
Commercial and Industrial [Member] | Substandard [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Gross bank loans | 61,346 | 107,747
Commercial and Industrial [Member] | Doubtful [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Gross bank loans | 9,225 | 6,571
Securities-Based Loans [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Gross bank loans | 2,785,679 | 2,880,158
Securities-Based Loans [Member] | Pass [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Gross bank loans | 2,785,676 | 2,880,158
Securities-Based Loans [Member] | Doubtful [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Gross bank loans | 3 |
Commercial Real Estate [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Gross bank loans | 872,010 | 409,847
Commercial Real Estate [Member] | Pass [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Gross bank loans | 775,010 | 407,298
Commercial Real Estate [Member] | Special Mention [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Gross bank loans | 77,000 | 2,548
Commercial Real Estate [Member] | Substandard [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Gross bank loans | 20,000 |
Commercial Real Estate [Member] | Doubtful [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Gross bank loans |  | 1
Home Equity Lines Of Credit [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Gross bank loans | 106,037 | 82,508
Home Equity Lines Of Credit [Member] | Pass [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Gross bank loans | 106,037 | 82,479
Home Equity Lines Of Credit [Member] | Special Mention [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Gross bank loans |  | 29
Construction And Land [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Gross bank loans | 564,581 | 511,084
Construction And Land [Member] | Pass [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Gross bank loans | 564,581 | 476,844
Construction And Land [Member] | Special Mention [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Gross bank loans |  | 14,240
Construction And Land [Member] | Substandard [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Gross bank loans |  | 20,000
Other [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Gross bank loans | 47,624 | 32,111
Other [Member] | Pass [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Gross bank loans | 47,622 | $ 32,111
Other [Member] | Doubtful [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Gross bank loans | $ 2 |

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- Definition Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=124259787&loc=d3e4428-111522 + Details
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