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Financial Instruments With Off-Balance Sheet Risk - Summary of Outstanding Contract Amounts of Off Balance Sheet Credit Risk Related Financial Instruments (Detail) - Unfunded Loan Commitment [Member] - USD ($) $ in Thousands | Jun. 30, 2023 | Dec. 31, 2022
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Schedule Of Loans And Leases Receivable Unfunded Commitments Under Line Of Credit [Line Items] |  |
Unfunded commitments under lines of credit | $ 248,781 | $ 231,149
Home equity loans [Member] |  |
Schedule Of Loans And Leases Receivable Unfunded Commitments Under Line Of Credit [Line Items] |  |
Unfunded commitments under lines of credit | 41,155 | 43,798
Commercial real estate, construction, and land development [Member] |  |
Schedule Of Loans And Leases Receivable Unfunded Commitments Under Line Of Credit [Line Items] |  |
Unfunded commitments under lines of credit | 60,492 | 62,146
Commercial and industrial [Member] |  |
Schedule Of Loans And Leases Receivable Unfunded Commitments Under Line Of Credit [Line Items] |  |
Unfunded commitments under lines of credit | $ 147,134 | $ 125,205

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