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Bank Loans (Activity In The Allowance For Loan Losses By Portfolio Segment) (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2022 | Mar. 31, 2021
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Beginning Balance | $ 99,344 | $ 112,029
Provision | (4,854) | (3,427)
Charge-offs |  | (934)
Recoveries |  | 0
Ending Balance | 104,198 | 107,668
Commercial And Industrial |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Beginning Balance | 53,529 | 67,222
Provision | 1,051 | 9,972
Charge-offs |  | (934)
Recoveries |  | 0
Ending Balance | 54,580 | 56,316
Residential Mortgage |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Beginning Balance | 28,560 | 16,300
Provision | 4,367 | 365
Ending Balance | 32,927 | 16,665
Securities-Based Loans [Member] |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Beginning Balance | 4,006 | 2,015
Provision | (30) | 154
Ending Balance | 3,976 | 2,169
Commercial Real Estate [Member] |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Beginning Balance | 3,934 | 8,580
Provision | (254) | (4,480)
Ending Balance | 3,680 | 13,060
Construction And Land [Member] |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Beginning Balance | 8,536 | 17,275
Provision | (415) | 1,598
Ending Balance | 8,121 | 18,873
Home Equity Lines Of Credit [Member] |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Beginning Balance | 511 | 374
Provision | 172 | (33)
Recoveries |  | 0
Ending Balance | 683 | 341
Other [Member] |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Beginning Balance | 268 | 263
Provision | (37) | 19
Charge-offs |  | 0
Recoveries |  | 0
Ending Balance | $ 231 | $ 244

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- Definition Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524 + Details
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- Definition Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524 + Details
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- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 6.L.1) -URI http://asc.fasb.org/extlink&oid=122038336&loc=d3e74567-122707 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=121614798&loc=d3e15032-111544 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524 + Details
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