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Fair Value of Financial Instruments - Estimated Fair Values and Related Carrying or Notional Amounts (Detail) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Financial Assets:
Securities - available-for-sale	$ 348,255	$ 390,789
Financial Liabilities:
Other borrowings		10,000
Subordinated notes, net of unamortized issuance costs	34,673	34,586
Dividend payable	2,838	2,832
Reported Value Measurement [Member]
Financial Assets:
Cash and cash equivalents	153,182	84,409
Interest-bearing time deposits	2,989	4,442
Securities - available-for-sale	348,255	390,789
Other securities	16,995	9,799
Loans held for sale	1,039	827
Loans, net	2,504,329	2,336,074
Interest receivable	12,902	10,440
Financial Liabilities:
Total Deposits	2,575,280	2,468,864
Federal funds purchased and securities sold under agreement to repurchase	30,527	54,206
Federal Home Loan Bank advances	266,286	127,485
Other borrowings		10,000
Subordinated notes, net of unamortized issuance costs	34,673	34,586
Interest payable	4,760	1,739
Fair Value [Member]
Financial Assets:
Cash and cash equivalents	153,182	84,409
Interest-bearing time deposits	2,977	4,440
Securities - available-for-sale	348,255	390,789
Other securities	16,995	9,799
Loans held for sale	1,023	815
Loans, net	2,336,246	2,171,152
Interest receivable	12,902	10,440
Financial Liabilities:
Total Deposits	2,566,105	2,454,475
Federal funds purchased and securities sold under agreement to repurchase	30,527	54,206
Federal Home Loan Bank advances	260,871	125,761
Other borrowings		10,000
Subordinated notes, net of unamortized issuance costs	30,642	30,993
Interest payable	4,760	1,739
Level 1 [Member]
Financial Assets:
Cash and cash equivalents	153,182	84,409
Securities - available-for-sale	81,978	94,678
Financial Liabilities:
Total Deposits	505,358	532,794
Level 2 [Member]
Financial Assets:
Interest-bearing time deposits	2,977	4,440
Securities - available-for-sale	263,850	292,766
Financial Liabilities:
Other borrowings		10,000
Subordinated notes, net of unamortized issuance costs	30,642	30,993
Level 3 [Member]
Financial Assets:
Securities - available-for-sale	2,427	3,345
Other securities	16,995	9,799
Loans held for sale	1,023	815
Loans, net	2,336,246	2,171,152
Interest receivable	12,902	10,440
Financial Liabilities:
Total Deposits	2,060,747	1,921,681
Federal funds purchased and securities sold under agreement to repurchase	30,527	54,206
Federal Home Loan Bank advances	260,871	125,761
Interest payable	4,760	1,739
Interest Bearing Deposits [Member] | Reported Value Measurement [Member]
Financial Liabilities:
Total Deposits	1,369,477	1,378,090
Interest Bearing Deposits [Member] | Fair Value [Member]
Financial Liabilities:
Total Deposits	1,369,406	1,377,944
Interest Bearing Deposits [Member] | Level 3 [Member]
Financial Liabilities:
Total Deposits	1,369,406	1,377,944
Non Interest Bearing Deposits [Member] | Reported Value Measurement [Member]
Financial Liabilities:
Total Deposits	505,358	532,794
Non Interest Bearing Deposits [Member] | Fair Value [Member]
Financial Liabilities:
Total Deposits	505,358	532,794
Non Interest Bearing Deposits [Member] | Level 1 [Member]
Financial Liabilities:
Total Deposits	505,358	532,794
Time Deposits [Member] | Reported Value Measurement [Member]
Financial Liabilities:
Total Deposits	700,445	557,980
Time Deposits [Member] | Fair Value [Member]
Financial Liabilities:
Total Deposits	691,341	543,737
Time Deposits [Member] | Level 3 [Member]
Financial Liabilities:
Total Deposits	$ 691,341	$ 543,737

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