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Loans - Additional Information (Detail) | 9 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Sep. 30, 2022 USD ($) | Dec. 31, 2021 USD ($) Loan | Dec. 31, 2020 USD ($) Loan | Sep. 30, 2021 USD ($)
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Total Loans | $ 2,328,614,000 | $ 1,997,879,000 |  |
Net deferred loan fees | 1,741,000 | 2,924,000 |  |
Loans processed | 0 |  |  | $ 0
Paycheck Protection Program Loans [Member] |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Net deferred loan fees | 38,000 | $ 1,762,000 |  |
Number of loans processed | Loan |  | 3,600 | 3,600 |
Loans processed |  | $ 399,400,000 | $ 399,400,000 |
Loans forgiven or paid off | 398,400,000 |  |  |
Loans recognized fees in income | 1,700,000 |  |  |
Unearned fees remain | 38,000 |  |  |
Commercial and Agriculture [Member] |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Total Loans | 227,387,000 | 246,502,000 |  |
Commercial and Agriculture [Member] | Paycheck Protection Program Loans [Member] |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Total Loans | $ 819,000 | $ 43,209,000 |  |

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