Fair Value Measurement - Fair Value, by Balance Sheet Grouping (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Financial instruments - assets
AFS, at fair value	$ 217,632	$ 223,555
Estimated Fair Value	351,204	357,521
Loans held for sale	4,581	3,855
Derivative assets	14,543	11,944
Level 1
Financial instruments - assets
Cash and cash equivalents	68,085	96,763
AFS, at fair value	0	0
Estimated Fair Value	0	0
Equity securities	431	438
Loans held for sale	0	0
Net loans	0	0
Restricted investment in bank stocks	17,446	16,768
Accrued interest receivable	26,975	25,820
Derivative 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	16,330	14,257
Derivative liabilities	0	0
Level 2
Financial instruments - assets
Cash and cash equivalents	0	0
AFS, at fair value	217,632	223,555
Estimated Fair Value	351,204	357,521
Equity securities	0	0
Loans held for sale	4,581	3,855
Net loans	0	0
Restricted investment in bank stocks	0	0
Accrued interest receivable	0	0
Derivative assets	14,543	11,944
Financial instruments - liabilities
Deposits	4,368,088	4,337,723
Short-term borrowings	271,849	241,532
Long-term debt	20,768	55,081
Subordinated debt	40,332	39,515
Accrued interest payable	0	0
Derivative liabilities	11,315	10,484
Level 3
Financial instruments - assets
Cash and cash equivalents	0	0
AFS, at fair value	0	0
Estimated Fair Value	0	0
Equity securities	0	0
Loans held for sale	0	0
Net loans	4,285,266	4,221,926
Restricted investment in bank stocks	0	0
Accrued interest receivable	0	0
Derivative 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	68,085	96,763
AFS, at fair value	217,632	223,555
Estimated Fair Value	396,998	399,128
Equity securities	431	438
Loans held for sale	4,581	3,855
Net loans	4,283,925	4,218,605
Restricted investment in bank stocks	17,446	16,768
Accrued interest receivable	26,975	25,820
Derivative assets	14,543	11,944
Financial instruments - liabilities
Deposits	4,379,105	4,346,212
Short-term borrowings	271,849	241,532
Long-term debt	20,768	55,806
Subordinated debt	46,201	46,354
Accrued interest payable	16,330	14,257
Derivative liabilities	11,315	10,484
Estimated Fair Value
Financial instruments - assets
Cash and cash equivalents	68,085	96,763
AFS, at fair value	217,632	223,555
Estimated Fair Value	351,204	357,521
Equity securities	431	438
Loans held for sale	4,581	3,855
Net loans	4,285,266	4,221,926
Restricted investment in bank stocks	17,446	16,768
Accrued interest receivable	26,975	25,820
Derivative assets	14,543	11,944
Financial instruments - liabilities
Deposits	4,368,088	4,337,723
Short-term borrowings	271,849	241,532
Long-term debt	20,768	55,081
Subordinated debt	40,332	39,515
Accrued interest payable	16,330	14,257
Derivative liabilities	$ 11,315	$ 10,484