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Allowance for Loan Losses - Additional Information (Detail) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 USD ($) SecurityLoan | Dec. 31, 2021 USD ($) SecurityLoan | Dec. 31, 2020 USD ($) SecurityLoan
Accounts Notes And Loans Receivable [Line Items] |  |  |
Period for calculating Loss migration rates of portfolio segments | 3 years |  |
Allowance for loan losses | $ 28,511 | $ 26,641 |
Provision for loan losses | $ 1,752 | 830 | $ 10,112
Percentage of eligible paycheck protection program loan |  |  | 100.00%
Number of days past due for loans to be considered as nonperforming | 90 days |  |
Reasonable period for nonperforming TDRs to be returned to performing status | 6 months |  |
Number of days reaching where loans are considered for nonaccrual status | 90 days |  |
Conditions where loans are considered for nonaccrual status | A loan may be returned to accruing status only if one of three conditions are met: the loan is well-secured and none of the principal and interest has been past due for a minimum of 90 days; the loan is a TDR and the borrower has made a minimum of six months payments; or the principal and interest payments are reasonably assured and a sustained period of performance has occurred, generally six months. |  |
Gross interest income recorded on nonaccrual loans | $ 384 | 307 | $ 536
Interest income on nonaccrual loans recognized on cash basis | $ 451 | $ 716 | $ 477
Defaulted loans | SecurityLoan | 0 | 0 | 0
Impaired loans | greater than $350 |  |
Foreclosed assets | $ 0 |  |
Residential mortgages in process of foreclosure | 399 | $ 293 |
Allowance for loan losses recorded for acquired loans | 0 | 0 |
Vision Financial Group [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Provision for loan losses | 452,000 |  |
TDRs [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Allowance for loan losses | $ 7 | $ 18 | $ 35

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- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 6.L.1) -URI https://asc.fasb.org/extlink&oid=122038336&loc=d3e74567-122707 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI https://asc.fasb.org/extlink&oid=121614798&loc=d3e15032-111544 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524 + Details
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