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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 | Mar. 31, 2022 | Dec. 31, 2021
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Schedule Of Loans And Leases Receivable Unfunded Commitments Under Line Of Credit [Line Items] |  |
Unfunded commitments under lines of credit | $ 169,746 | $ 145,067
Home equity loans [Member] |  |
Schedule Of Loans And Leases Receivable Unfunded Commitments Under Line Of Credit [Line Items] |  |
Unfunded commitments under lines of credit | 36,236 | 17,774
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 | 22,220 | 20,609
Commercial and industrial [Member] |  |
Schedule Of Loans And Leases Receivable Unfunded Commitments Under Line Of Credit [Line Items] |  |
Unfunded commitments under lines of credit | 106,212 | 100,440
Other [Member] |  |
Schedule Of Loans And Leases Receivable Unfunded Commitments Under Line Of Credit [Line Items] |  |
Unfunded commitments under lines of credit | $ 5,078 | $ 6,244

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