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Allowance for Credit Losses - Rollforward of the Reserve for Unfunded Commitments (Details) - Reserve for unfunded commitments - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Reserve for unfunded commitments: |  |
Reserve for unfunded commitments, beginning balance | $ 35,605 | $ 33,835
Provision | (792) | 2,364
Reserve for unfunded commitments, ending balance | 34,813 | 36,199
Commercial and Industrial |  |
Reserve for unfunded commitments: |  |
Reserve for unfunded commitments, beginning balance | 9,116 | 7,811
Provision | (324) | (658)
Reserve for unfunded commitments, ending balance | 8,792 | 7,153
Commercial Real Estate |  |
Reserve for unfunded commitments: |  |
Reserve for unfunded commitments, beginning balance | 1,787 | 2,004
Provision | 86 | (312)
Reserve for unfunded commitments, ending balance | 1,873 | 1,692
Construction |  |
Reserve for unfunded commitments: |  |
Reserve for unfunded commitments, beginning balance | 8,048 | 7,470
Provision | (1,151) | 1,482
Reserve for unfunded commitments, ending balance | 6,897 | 8,952
Residential Lending: Residential Mortgage |  |
Reserve for unfunded commitments: |  |
Reserve for unfunded commitments, beginning balance | 24 | 30
Provision | (10) | (13)
Reserve for unfunded commitments, ending balance | 14 | 17
Residential Lending: Home Equity Line |  |
Reserve for unfunded commitments: |  |
Reserve for unfunded commitments, beginning balance | 16,589 | 16,483
Provision | 598 | 1,853
Reserve for unfunded commitments, ending balance | 17,187 | 18,336
Consumer |  |
Reserve for unfunded commitments: |  |
Reserve for unfunded commitments, beginning balance | 41 | 37
Provision | 9 | 12
Reserve for unfunded commitments, ending balance | $ 50 | $ 49

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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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