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Fair Value of Financial Instruments - Estimated Fair Values and Related Carrying or Notional Amounts (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Financial Assets:
Securities - available-for-sale	$ 372,975	$ 390,789
Financial Liabilities:
Other borrowings		10,000
Subordinated notes, net of unamortized issuance costs	34,615	34,586
Reported Value Measurement [Member]
Financial Assets:
Cash and cash equivalents	64,325	84,409
Interest-bearing time deposits	4,435	4,442
Securities - available-for-sale	372,975	390,789
Other securities	11,543	9,799
Loans held for sale	951	827
Loans, net	2,422,018	2,336,074
Interest receivable	11,472	10,440
Financial Liabilities:
Total Deposits	2,513,168	2,468,864
Federal funds purchased and securities sold under agreement to repurchase	30,496	54,206
Federal Home Loan Bank advances	164,327	127,485
Other borrowings		10,000
Subordinated notes, net of unamortized issuance costs	34,615	34,586
Interest payable	2,587	1,739
Fair Value [Member]
Financial Assets:
Cash and cash equivalents	64,325	84,409
Interest-bearing time deposits	4,417	4,440
Securities - available-for-sale	372,975	390,789
Other securities	11,543	9,799
Loans held for sale	937	815
Loans, net	2,262,480	2,171,152
Interest receivable	11,472	10,440
Financial Liabilities:
Total Deposits	2,501,940	2,454,475
Federal funds purchased and securities sold under agreement to repurchase	30,496	54,206
Federal Home Loan Bank advances	161,723	125,761
Other borrowings		10,000
Subordinated notes, net of unamortized issuance costs	30,494	30,993
Interest payable	2,587	1,739
Level 1 [Member]
Financial Assets:
Cash and cash equivalents	64,325	84,409
Securities - available-for-sale	87,512	94,678
Financial Liabilities:
Total Deposits	520,145	532,794
Level 2 [Member]
Financial Assets:
Interest-bearing time deposits	4,417	4,440
Securities - available-for-sale	282,323	292,766
Financial Liabilities:
Other borrowings		10,000
Subordinated notes, net of unamortized issuance costs	30,494	30,993
Level 3 [Member]
Financial Assets:
Securities - available-for-sale	3,140	3,345
Other securities	11,543	9,799
Loans held for sale	937	815
Loans, net	2,262,480	2,171,152
Interest receivable	11,472	10,440
Financial Liabilities:
Total Deposits	1,981,795	1,921,681
Federal funds purchased and securities sold under agreement to repurchase	30,496	54,206
Federal Home Loan Bank advances	161,723	125,761
Interest payable	2,587	1,739
Interest Bearing Deposits [Member] | Reported Value Measurement [Member]
Financial Liabilities:
Total Deposits	1,391,084	1,378,090
Interest Bearing Deposits [Member] | Fair Value [Member]
Financial Liabilities:
Total Deposits	1,391,020	1,377,944
Interest Bearing Deposits [Member] | Level 3 [Member]
Financial Liabilities:
Total Deposits	1,391,020	1,377,944
Non Interest Bearing Deposits [Member] | Reported Value Measurement [Member]
Financial Liabilities:
Total Deposits	520,145	532,794
Non Interest Bearing Deposits [Member] | Fair Value [Member]
Financial Liabilities:
Total Deposits	520,145	532,794
Non Interest Bearing Deposits [Member] | Level 1 [Member]
Financial Liabilities:
Total Deposits	520,145	532,794
Time Deposits [Member] | Reported Value Measurement [Member]
Financial Liabilities:
Total Deposits	601,939	557,980
Time Deposits [Member] | Fair Value [Member]
Financial Liabilities:
Total Deposits	590,775	543,737
Time Deposits [Member] | Level 3 [Member]
Financial Liabilities:
Total Deposits	$ 590,775	$ 543,737

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