Fair Value Measurement - Carrying Amount and Fair Value of Financial Instruments Carried at Amortized Cost (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Financial Assets:
Cash and due from financial institutions	$ 60,406	$ 43,361
Other securities	29,998	33,585
Loans, net of allowance for loan losses	2,824,568	2,619,770
Bank owned life insurance	61,335	53,543
Accrued interest receivable	12,819	11,178
Financial Liabilities:
Time deposits	900,813
Short-term FHLB advances	338,000	393,700
Long-term FHLB advances	2,392	3,578
Securities sold under agreement to repurchase	0	25,143	$ 25,495
Other borrowings	9,859	15,516
Carrying Amount [Member]
Financial Assets:
Cash and due from financial institutions	60,406	43,361
Other securities	29,998	33,585
Loans, held for sale	1,725	683
Loans, net of allowance for loan losses	2,824,568	2,619,770
Bank owned life insurance	61,335	53,543
Accrued interest receivable	12,819	11,178
Financial Liabilities:
Nonmaturing deposits	2,084,216	2,300,215
Time deposits	900,812	319,769
Short-term FHLB advances	338,000	393,700
Long-term FHLB advances	2,392	3,578
Securities sold under agreement to repurchase		25,143
Subordinated debentures	103,943	103,799
Other borrowings	9,859	15,516
Accrued interest payable	9,525	668
Total Fair Value [Member]
Financial Assets:
Cash and due from financial institutions	60,406	43,361
Other securities	29,998	33,585
Loans, held for sale	1,725	698
Loans, net of allowance for loan losses	2,679,988	2,528,906
Bank owned life insurance	61,335	53,543
Accrued interest receivable	12,819	11,178
Financial Liabilities:
Nonmaturing deposits	2,084,216	2,300,215
Time deposits	899,443	318,886
Short-term FHLB advances	337,267	393,247
Long-term FHLB advances	2,419	3,534
Securities sold under agreement to repurchase		25,143
Subordinated debentures	101,563	98,513
Other borrowings	9,859	15,806
Accrued interest payable	9,525	668
(Level 1) [Member]
Financial Assets:
Cash and due from financial institutions	60,406	43,361
Other securities	29,998	33,585
Loans, held for sale	1,725	698
Bank owned life insurance	61,335	53,543
Accrued interest receivable	12,819	11,178
Financial Liabilities:
Nonmaturing deposits	2,084,216	2,300,215
Short-term FHLB advances	337,267	393,247
Securities sold under agreement to repurchase		25,143
Accrued interest payable	9,525	668
(Level 3) [Member]
Financial Assets:
Loans, net of allowance for loan losses	2,679,988	2,528,906
Financial Liabilities:
Time deposits	899,443	318,886
Long-term FHLB advances	2,419	3,534
Subordinated debentures	101,563	98,513
Other borrowings	$ 9,859	$ 15,806