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Allowance for Credit Losses - Rollforward of the Reserve for Unfunded Commitments (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Reserve for unfunded commitments: |  |  |  |
Reserve for unfunded commitments, beginning balance | $ 28,958 | $ 34,103 |  |
Provision |  | (4,881) |  |
Reserve for unfunded commitments, ending balance | 28,958 | 29,222 | $ 28,958 | $ 29,222
Commercial and Industrial |  |  |  |
Reserve for unfunded commitments: |  |  |  |
Reserve for unfunded commitments, beginning balance | 9,308 | 16,129 |  |
Provision | (1,668) | (3,321) |  |
Reserve for unfunded commitments, ending balance | 7,640 | 12,808 | 7,640 | 12,808
Commercial real estate |  |  |  |
Reserve for unfunded commitments: |  |  |  |
Reserve for unfunded commitments, beginning balance | 1,789 | 1,112 |  |
Provision | 1,961 | (134) |  |
Reserve for unfunded commitments, ending balance | 3,750 | 978 | 3,750 | 978
Construction |  |  |  |
Reserve for unfunded commitments: |  |  |  |
Reserve for unfunded commitments, beginning balance | 8,046 | 8,313 |  |
Provision | (1,962) | (440) |  |
Reserve for unfunded commitments, ending balance | 6,084 | 7,873 | 6,084 | 7,873
Residential mortgage |  |  |  |
Reserve for unfunded commitments: |  |  |  |
Reserve for unfunded commitments, beginning balance | 3 |  |  |
Provision | 29 |  |  |
Reserve for unfunded commitments, ending balance | 32 |  | 32 |
Home equity line |  |  |  |
Reserve for unfunded commitments: |  |  |  |
Reserve for unfunded commitments, beginning balance | 9,766 | 8,500 |  |
Provision | 1,657 | (979) |  |
Reserve for unfunded commitments, ending balance | 11,423 | 7,521 | 11,423 | 7,521
Consumer |  |  |  |
Reserve for unfunded commitments: |  |  |  |
Reserve for unfunded commitments, beginning balance | 46 | 49 |  |
Provision | (17) | (7) |  |
Reserve for unfunded commitments, ending balance | 29 | 42 | 29 | 42
Reserve for unfunded commitments |  |  |  |
Reserve for unfunded commitments: |  |  |  |
Reserve for unfunded commitments, beginning balance |  |  | 30,322 | 30,603
Provision |  |  | (1,364) | (1,381)
Reserve for unfunded commitments, ending balance | 28,958 | 29,222 | 28,958 | 29,222
Reserve for unfunded commitments | Commercial and Industrial |  |  |  |
Reserve for unfunded commitments: |  |  |  |
Reserve for unfunded commitments, beginning balance |  |  | 8,615 | 11,719
Provision |  |  | (975) | 1,089
Reserve for unfunded commitments, ending balance | 7,640 | 12,808 | 7,640 | 12,808
Reserve for unfunded commitments | Commercial real estate |  |  |  |
Reserve for unfunded commitments: |  |  |  |
Reserve for unfunded commitments, beginning balance |  |  | 2,114 | 1,328
Provision |  |  | 1,636 | (350)
Reserve for unfunded commitments, ending balance | 3,750 | 978 | 3,750 | 978
Reserve for unfunded commitments | Construction |  |  |  |
Reserve for unfunded commitments: |  |  |  |
Reserve for unfunded commitments, beginning balance |  |  | 8,963 | 9,037
Provision |  |  | (2,879) | (1,164)
Reserve for unfunded commitments, ending balance | 6,084 | 7,873 | 6,084 | 7,873
Reserve for unfunded commitments | Residential mortgage |  |  |  |
Reserve for unfunded commitments: |  |  |  |
Reserve for unfunded commitments, beginning balance |  |  | 15 | 2
Provision |  |  | 17 | (2)
Reserve for unfunded commitments, ending balance | 32 |  | 32 |
Reserve for unfunded commitments | Home equity line |  |  |  |
Reserve for unfunded commitments: |  |  |  |
Reserve for unfunded commitments, beginning balance |  |  | 10,546 | 8,452
Provision |  |  | 877 | (931)
Reserve for unfunded commitments, ending balance | 11,423 | 7,521 | 11,423 | 7,521
Reserve for unfunded commitments | Consumer |  |  |  |
Reserve for unfunded commitments: |  |  |  |
Reserve for unfunded commitments, beginning balance |  |  | 69 | 65
Provision |  |  | (40) | (23)
Reserve for unfunded commitments, ending balance | $ 29 | $ 42 | $ 29 | $ 42

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121611286&loc=d3e11927-110247 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=124255206&loc=SL82919202-210446 + Details
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