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Allowance for Credit Losses - Rollforward of the Reserve for Unfunded Commitments (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Reserve for unfunded commitments: |  |  |
Reserve for unfunded commitments, beginning balance |  | $ 30,603 | $ 600
Provision |  |  | 13,703
Reserve for unfunded commitments, ending balance |  |  | 30,603
Commercial and Industrial |  |  |
Reserve for unfunded commitments: |  |  |
Reserve for unfunded commitments, beginning balance |  | 11,719 |
Provision |  |  | 6,329
Reserve for unfunded commitments, ending balance |  |  | 11,719
Commercial real estate |  |  |
Reserve for unfunded commitments: |  |  |
Reserve for unfunded commitments, beginning balance |  | 1,328 |
Provision |  |  | 550
Reserve for unfunded commitments, ending balance |  |  | 1,328
Construction |  |  |
Reserve for unfunded commitments: |  |  |
Reserve for unfunded commitments, beginning balance |  | 9,037 |
Provision |  |  | 4,918
Reserve for unfunded commitments, ending balance |  |  | 9,037
Residential Lending: Residential Mortgage |  |  |
Reserve for unfunded commitments: |  |  |
Reserve for unfunded commitments, beginning balance |  | 2 |
Provision |  |  | (5)
Reserve for unfunded commitments, ending balance |  |  | 2
Home equity line |  |  |
Reserve for unfunded commitments: |  |  |
Reserve for unfunded commitments, beginning balance |  | 8,452 |
Provision |  |  | 1,865
Reserve for unfunded commitments, ending balance |  |  | 8,452
Consumer Portfolio Segment [Member] |  |  |
Reserve for unfunded commitments: |  |  |
Reserve for unfunded commitments, beginning balance |  | 65 | 600
Provision |  |  | 46
Reserve for unfunded commitments, ending balance |  |  | 65
Reserve for unfunded commitments |  |  |
Reserve for unfunded commitments: |  |  |
Reserve for unfunded commitments, beginning balance | $ 30,322 | 30,603 |
Provision | 3,513 | (281) |
Reserve for unfunded commitments, ending balance | 33,835 | 30,322 | 30,603
Reserve for unfunded commitments | Commercial and Industrial |  |  |
Reserve for unfunded commitments: |  |  |
Reserve for unfunded commitments, beginning balance | 8,615 | 11,719 |
Provision | (804) | (3,104) |
Reserve for unfunded commitments, ending balance | 7,811 | 8,615 | 11,719
Reserve for unfunded commitments | Commercial real estate |  |  |
Reserve for unfunded commitments: |  |  |
Reserve for unfunded commitments, beginning balance | 2,114 | 1,328 |
Provision | (110) | 786 |
Reserve for unfunded commitments, ending balance | 2,004 | 2,114 | 1,328
Reserve for unfunded commitments | Construction |  |  |
Reserve for unfunded commitments: |  |  |
Reserve for unfunded commitments, beginning balance | 8,963 | 9,037 |
Provision | (1,493) | (74) |
Reserve for unfunded commitments, ending balance | 7,470 | 8,963 | 9,037
Reserve for unfunded commitments | Residential Lending: Residential Mortgage |  |  |
Reserve for unfunded commitments: |  |  |
Reserve for unfunded commitments, beginning balance | 15 | 2 |
Provision | 15 | 13 |
Reserve for unfunded commitments, ending balance | 30 | 15 | 2
Reserve for unfunded commitments | Home equity line |  |  |
Reserve for unfunded commitments: |  |  |
Reserve for unfunded commitments, beginning balance | 10,546 | 8,452 |
Provision | 5,937 | 2,094 |
Reserve for unfunded commitments, ending balance | 16,483 | 10,546 | 8,452
Reserve for unfunded commitments | Consumer Portfolio Segment [Member] |  |  |
Reserve for unfunded commitments: |  |  |
Reserve for unfunded commitments, beginning balance | 69 | 65 |
Provision | (32) | 4 |
Reserve for unfunded commitments, ending balance | $ 37 | $ 69 | 65
ASU No. 2016-13 |  |  |
Reserve for unfunded commitments: |  |  |
Reserve for unfunded commitments, beginning balance |  |  | 16,300
ASU No. 2016-13 | Commercial and Industrial |  |  |
Reserve for unfunded commitments: |  |  |
Reserve for unfunded commitments, beginning balance |  |  | 5,390
ASU No. 2016-13 | Commercial real estate |  |  |
Reserve for unfunded commitments: |  |  |
Reserve for unfunded commitments, beginning balance |  |  | 778
ASU No. 2016-13 | Construction |  |  |
Reserve for unfunded commitments: |  |  |
Reserve for unfunded commitments, beginning balance |  |  | 4,119
ASU No. 2016-13 | Residential Lending: Residential Mortgage |  |  |
Reserve for unfunded commitments: |  |  |
Reserve for unfunded commitments, beginning balance |  |  | 7
ASU No. 2016-13 | Home equity line |  |  |
Reserve for unfunded commitments: |  |  |
Reserve for unfunded commitments, beginning balance |  |  | 6,587
ASU No. 2016-13 | Consumer Portfolio Segment [Member] |  |  |
Reserve for unfunded commitments: |  |  |
Reserve for unfunded commitments, beginning balance |  |  | $ (581)

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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 https://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 https://asc.fasb.org/extlink&oid=124255206&loc=SL82919202-210446 + Details
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