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Bank Loans (Activity In The Allowance For Loan Losses By Portfolio Segment) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |
Beginning Balance | $ 115,821 | $ 90,472 | $ 95,579 | $ 85,833
CECL Adoption |  |  | (11,736) |
Provision | (1,777) | 929 | 30,369 | 5,565
Charge-offs | (23) | (56) | (193) | (166)
Recoveries | 92 | 15 | 94 | 128
Ending Balance | 114,113 | 91,360 | 114,113 | 91,360
Commercial And Industrial [Member] |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |
Beginning Balance | 65,503 | 69,263 | 69,949 | 68,367
CECL Adoption |  |  | (19,940) |
Provision | 10,303 | (1,070) | 25,949 | (116)
Charge-offs | (1) | (21) | (153) | (79)
Recoveries | 4 |  | 4 |
Ending Balance | 75,809 | 68,172 | 75,809 | 68,172
Residential Real Estate [Member] |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |
Beginning Balance | 24,043 | 12,042 | 14,253 | 11,228
CECL Adoption |  |  | 3,499 |
Provision | (6,360) | 519 | (69) | 1,246
Recoveries |  | 1 |  | 88
Ending Balance | 17,683 | 12,562 | 17,683 | 12,562
Securities-Based Loans [Member] |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |
Beginning Balance | 1,807 | 2,311 | 2,361 | 1,978
CECL Adoption |  |  | 1,346 |
Provision | 95 | (130) | (1,805) | 203
Ending Balance | 1,902 | 2,181 | 1,902 | 2,181
Commercial Real Estate [Member] |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |
Beginning Balance | 10,647 | 2,478 | 3,564 | 1,778
CECL Adoption |  |  | 791 |
Provision | (2,730) | 425 | 3,562 | 1,125
Ending Balance | 7,917 | 2,903 | 7,917 | 2,903
Construction And Land [Member] |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |
Beginning Balance | 13,075 | 2,402 | 4,613 | 1,241
CECL Adoption |  |  | 2,674 |
Provision | (2,889) | 865 | 2,899 | 2,026
Ending Balance | 10,186 | 3,267 | 10,186 | 3,267
Home Equity Lines Of Credit [Member] |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |
Beginning Balance | 499 | 421 | 442 | 310
CECL Adoption |  |  | 39 |
Provision | (205) | 13 | (188) | 123
Recoveries | 87 | 1 | 88 | 2
Ending Balance | 381 | 435 | 381 | 435
Other [Member] |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |
Beginning Balance | 247 | 179 | 194 | 88
CECL Adoption |  |  | 58 |
Provision | 9 | 38 | 21 | 156
Charge-offs | (22) | (35) | (40) | (87)
Recoveries | 1 | 13 | 2 | 38
Ending Balance | $ 235 | 195 | 235 | 195
Unallocated [Member] |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |
Beginning Balance |  | 1,376 | 203 | 843
CECL Adoption |  |  | $ (203) |
Provision |  | 269 |  | 802
Ending Balance |  | $ 1,645 |  | $ 1,645

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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=121611835&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=121611835&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://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=121611835&loc=SL6953423-111524 Reference 2: 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 3: 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=121611835&loc=SL6953423-111524 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -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=27010918&loc=d3e74567-122707 + Details
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