Fair Value Measurement - Fair Value, by Balance Sheet Grouping (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Financial instruments - assets
AFS, at fair value	$ 223,555	$ 237,878
Held-to-maturity, fair value	357,521	348,505
Loans held for sale	3,855	2,475
Loan balance	324,500	768,500
Level 1
Financial instruments - assets
Cash and cash equivalents	96,763	60,881
AFS, at fair value	0	0
Held-to-maturity, fair value	0	0
Equity securities	438	430
Loans held for sale	0	0
Loan balance	0	0
Restricted investment in bank stocks	16,768	8,315
Accrued interest receivable	25,820	18,405
Other assets:	0	0
Financial instruments - liabilities
Deposits	0	0
Short-term borrowings	0	0
Long-term debt	0	0
Subordinated debt	0	0
Accrued interest payable	14,257	2,303
Derivative liabilities	0	0
Level 2
Financial instruments - assets
Cash and cash equivalents	0	0
AFS, at fair value	223,555	237,878
Held-to-maturity, fair value	357,521	348,505
Equity securities	0	0
Loans held for sale	3,855	2,475
Loan balance	0	0
Restricted investment in bank stocks	0	0
Accrued interest receivable	0	0
Other assets:	11,944	11,703
Financial instruments - liabilities
Deposits	4,337,723	3,761,260
Short-term borrowings	241,532	102,647
Long-term debt	55,081	1,069
Subordinated debt	39,515	55,917
Accrued interest payable	0	0
Derivative liabilities	10,484	11,737
Level 3
Financial instruments - assets
Cash and cash equivalents	0	0
AFS, at fair value	0	0
Held-to-maturity, fair value	0	0
Equity securities	0	0
Loans held for sale	0	0
Loan balance	4,221,926	3,439,948
Restricted investment in bank stocks	0	0
Accrued interest receivable	0	0
Other assets:	0	0
Financial instruments - liabilities
Deposits	0	0
Short-term borrowings	0	0
Long-term debt	0	0
Subordinated debt	0	0
Accrued interest payable	0	0
Derivative liabilities	0	0
Carrying Amount
Financial instruments - assets
Cash and cash equivalents	96,763	60,881
AFS, at fair value	223,555	237,878
Held-to-maturity, fair value	399,128	399,494
Equity securities	438	430
Loans held for sale	3,855	2,475
Loan balance	4,218,605	3,495,162
Restricted investment in bank stocks	16,768	8,315
Accrued interest receivable	25,820	18,405
Other assets:	11,944	11,703
Financial instruments - liabilities
Deposits	4,346,212	3,778,331
Short-term borrowings	241,532	102,647
Long-term debt	55,806	1,119
Subordinated debt	46,354	56,941
Accrued interest payable	14,257	2,303
Derivative liabilities	10,484	11,737
Total
Financial instruments - assets
Cash and cash equivalents	96,763	60,881
AFS, at fair value	223,555	237,878
Held-to-maturity, fair value	357,521	348,505
Equity securities	438	430
Loans held for sale	3,855	2,475
Loan balance	4,221,926	3,439,948
Restricted investment in bank stocks	16,768	8,315
Accrued interest receivable	25,820	18,405
Other assets:	11,944	11,703
Financial instruments - liabilities
Deposits	4,337,723	3,761,260
Short-term borrowings	241,532	102,647
Long-term debt	55,081	1,069
Subordinated debt	39,515	55,917
Accrued interest payable	14,257	2,303
Derivative liabilities	$ 10,484	$ 11,737