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Loans and Allowance for Loan Losses - Summary of Impaired Financing Receivables (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021 | Dec. 31, 2021
Financing Receivable Impaired [Line Items] |  |  |  |  |
Impaired financing receivable, with no specific allowance recorded, recorded investment | $ 10,325 |  | $ 10,325 |  | $ 9,733
Impaired financing receivable, with no specific allowance recorded, unpaid principal balance | 14,523 |  | 14,523 |  | 10,388
Impaired financing receivable, related allowance | 1,063 |  | 1,063 |  | 879
Impaired financing receivable, average recorded investment | 14,762 | $ 8,041 | 20,639 | $ 7,407 |
Impaired financing receivable, interest income recognized | 85 | 87 | 372 | 246 |
Commercial and Industrial [Member] |  |  |  |  |
Financing Receivable Impaired [Line Items] |  |  |  |  |
Impaired financing receivable, with no specific allowance recorded, recorded investment | 1,689 |  | 1,689 |  |
Impaired financing receivable, with no specific allowance recorded, unpaid principal balance | 5,165 |  | 5,165 |  |
Impaired financing receivable, related allowance | 747 |  | 747 |  | 836
Impaired financing receivable, with an allowance recorded, recorded investment | 4,016 |  | 4,016 |  | 4,612
Impaired financing receivable, with an allowance recorded, unpaid principal balance | 4,016 |  | 4,016 |  | 4,612
Impaired financing receivable, with no specific allowance recorded, average recorded investment | 5,197 | 4,710 | 5,568 | 4,390 |
Impaired financing receivable, with no specific allowance recorded, interest income recognized |  | 53 | 74 | 149 |
Impaired financing receivable, with an allowance recorded, interest income recognized | 44 | 0 | 77 | 0 |
Impaired financing receivable, with an allowance recorded, average recorded investment | 4,024 | 0 | 4,644 | 0 |
Real Estate [Member] | Mortgage, Commercial [Member] |  |  |  |  |
Financing Receivable Impaired [Line Items] |  |  |  |  |
Impaired financing receivable, with no specific allowance recorded, recorded investment | 2,715 |  | 2,715 |  |
Impaired financing receivable, with no specific allowance recorded, unpaid principal balance | 2,829 |  | 2,829 |  |
Impaired financing receivable, related allowance | 301 |  | 301 |  | 1
Impaired financing receivable, with an allowance recorded, recorded investment | 47 |  | 47 |  | 3,194
Impaired financing receivable, with an allowance recorded, unpaid principal balance | 662 |  | 662 |  | 3,849
Impaired financing receivable, with no specific allowance recorded, average recorded investment | 2,839 | 1,378 | 6,991 | 1,402 |
Impaired financing receivable, with no specific allowance recorded, interest income recognized | 26 | 21 | 174 | 62 |
Impaired financing receivable, with an allowance recorded, interest income recognized | 1 | 0 | 3 | 0 |
Impaired financing receivable, with an allowance recorded, average recorded investment | 851 | 0 | 1,503 | 0 |
Real Estate [Member] | Construction, commercial [Member] |  |  |  |  |
Financing Receivable Impaired [Line Items] |  |  |  |  |
Impaired financing receivable, with no specific allowance recorded, recorded investment | 521 |  | 521 |  | 527
Impaired financing receivable, with no specific allowance recorded, unpaid principal balance | 521 |  | 521 |  | 527
Impaired financing receivable, with no specific allowance recorded, average recorded investment | 521 | 532 | 522 | 537 |
Impaired financing receivable, with no specific allowance recorded, interest income recognized | 8 | 8 | 16 | 24 |
Real Estate [Member] | Mortgage, Residential [Member] |  |  |  |  |
Financing Receivable Impaired [Line Items] |  |  |  |  |
Impaired financing receivable, with no specific allowance recorded, recorded investment | 1,195 |  | 1,195 |  |
Impaired financing receivable, with no specific allowance recorded, unpaid principal balance | 1,188 |  | 1,188 |  |
Impaired financing receivable, related allowance | 15 |  | 15 |  | 42
Impaired financing receivable, with an allowance recorded, recorded investment | 142 |  | 142 |  | 1,400
Impaired financing receivable, with an allowance recorded, unpaid principal balance | 142 |  | 142 |  | $ 1,400
Impaired financing receivable, with no specific allowance recorded, average recorded investment | 1,188 | 1,421 | 1,324 | 1,078 |
Impaired financing receivable, with no specific allowance recorded, interest income recognized | 5 | 5 | 22 | 11 |
Impaired financing receivable, with an allowance recorded, interest income recognized | 1 | 0 | 6 | 0 |
Impaired financing receivable, with an allowance recorded, average recorded investment | $ 142 | $ 0 | $ 86 | $ 0 |

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