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Loans and Allowance for Loan Losses - Summary of Impaired Financing Receivables (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
Financing Receivable Impaired [Line Items] |  |
Impaired financing receivable, with no specific allowance recorded, recorded investment | $ 9,733 | $ 2,331
Impaired financing receivable, with no specific allowance recorded, unpaid principal balance | 10,388 | 2,835
Impaired financing receivable, related allowance | 879 | 144
Impaired financing receivable, with no specific allowance recorded, average recorded investment | 9,240 | 2,991
Impaired financing receivable, with an allowance recorded, interest income recognized | 390 | 6
Commercial and Industrial [Member] |  |
Financing Receivable Impaired [Line Items] |  |
Impaired financing receivable, with no specific allowance recorded, recorded investment | 4,612 | 234
Impaired financing receivable, with no specific allowance recorded, unpaid principal balance | 4,612 | 234
Impaired financing receivable, related allowance | 836 | 144
Impaired financing receivable, with no specific allowance recorded, average recorded investment | 4,369 | 362
Impaired financing receivable, with an allowance recorded, interest income recognized | 260 |
Real Estate [Member] | Mortgage, Residential [Member] |  |
Financing Receivable Impaired [Line Items] |  |
Impaired financing receivable, with no specific allowance recorded, recorded investment | 1,400 | 1,645
Impaired financing receivable, with no specific allowance recorded, unpaid principal balance | 1,400 | 2,030
Impaired financing receivable, related allowance | 42 |
Impaired financing receivable, with no specific allowance recorded, average recorded investment | 700 | 2,091
Impaired financing receivable, with an allowance recorded, interest income recognized | 23 | 4
Real Estate [Member] | Commercial Construction [Member] |  |
Financing Receivable Impaired [Line Items] |  |
Impaired financing receivable, with no specific allowance recorded, recorded investment | 527 |
Impaired financing receivable, with no specific allowance recorded, unpaid principal balance | 527 |
Impaired financing receivable, related allowance |  |
Impaired financing receivable, with no specific allowance recorded, average recorded investment | 535 |
Impaired financing receivable, with an allowance recorded, interest income recognized | 37 |
Real Estate [Member] | Mortgage, Commercial [Member] |  |
Financing Receivable Impaired [Line Items] |  |
Impaired financing receivable, with no specific allowance recorded, recorded investment | 3,194 | 452
Impaired financing receivable, with no specific allowance recorded, unpaid principal balance | 3,849 | 571
Impaired financing receivable, related allowance | 1 |
Impaired financing receivable, with no specific allowance recorded, average recorded investment | 3,636 | 538
Impaired financing receivable, with an allowance recorded, interest income recognized | $ 70 | $ 2

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- Definition Amount of allowance for credit losses related to recorded investment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=123577603&loc=d3e5212-111524 + Details
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