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Allowance for Credit Losses - Rollforward of the Reserve for Unfunded Commitments (Details) - Unfunded Loan Commitment [Member] - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Reserve for unfunded commitments: |  |  |  |
Reserve for unfunded commitments, beginning balance | $ 33,413 | $ 36,199 | $ 35,605 | $ 33,835
Provision | 284 | 1,576 | (1,908) | 3,940
Reserve for unfunded commitments, ending balance | 33,697 | 37,775 | 33,697 | 37,775
Commercial and Industrial |  |  |  |
Reserve for unfunded commitments: |  |  |  |
Reserve for unfunded commitments, beginning balance | 7,947 | 6,354 | 9,116 | 7,811
Provision | 104 | 3,577 | (1,065) | 2,120
Reserve for unfunded commitments, ending balance | 8,051 | 9,931 | 8,051 | 9,931
Commercial Real Estate Portfolio Segment [Member] |  |  |  |
Reserve for unfunded commitments: |  |  |  |
Reserve for unfunded commitments, beginning balance | 1,435 | 1,991 | 1,787 | 2,004
Provision | (262) | (129) | (614) | (142)
Reserve for unfunded commitments, ending balance | 1,173 | 1,862 | 1,173 | 1,862
Construction |  |  |  |
Reserve for unfunded commitments: |  |  |  |
Reserve for unfunded commitments, beginning balance | 7,122 | 9,789 | 8,048 | 7,470
Provision | 643 | (382) | (283) | 1,937
Reserve for unfunded commitments, ending balance | 7,765 | 9,407 | 7,765 | 9,407
Real Estate Loan [Member] |  |  |  |
Reserve for unfunded commitments: |  |  |  |
Reserve for unfunded commitments, beginning balance |  | 19 | 24 | 30
Provision |  | (6) | (2) | (17)
Reserve for unfunded commitments, ending balance | 22 | 13 | 22 | 13
Residential Lending: Home Equity Line |  |  |  |
Reserve for unfunded commitments: |  |  |  |
Reserve for unfunded commitments, beginning balance | 16,879 | 18,015 | 16,589 | 16,483
Provision | (240) | (1,475) | 50 | 57
Reserve for unfunded commitments, ending balance | 16,639 | 16,540 | 16,639 | 16,540
Residential Portfolio Segment [Member] |  |  |  |
Reserve for unfunded commitments: |  |  |  |
Reserve for unfunded commitments, beginning balance | 8 |  |  |
Provision | 14 |  |  |
Reserve for unfunded commitments, ending balance | 22 |  | 22 |
Consumer |  |  |  |
Reserve for unfunded commitments: |  |  |  |
Reserve for unfunded commitments, beginning balance | 22 | 31 | 41 | 37
Provision | 25 | (9) | 6 | (15)
Reserve for unfunded commitments, ending balance | $ 47 | $ 22 | $ 47 | $ 22

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- Definition Amount of expected credit loss for credit exposure on off-balance-sheet commitment, including but not limited to, loan commitment, standby letter of credit, financial guarantee not accounted for as insurance. Excludes off-balance sheet credit exposure accounted for as insurance and instrument accounted for under derivatives and hedging. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479344/326-20-45-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482454/460-10-45-1 + Details
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