Fair Value Measurement - Schedule of Fair Value, by Balance Sheet Grouping (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Financial instruments - assets
Available-for-sale securities	$ 484,130	$ 416,314
Held-to-maturity securities	314,398	321,702
Level 1
Financial instruments - assets
Cash and cash equivalents	141,190	98,918
Available-for-sale securities	0	0
Held-to-maturity securities	0	0
Equity securities	5,412	5,446
Loans held-for-sale	0	0
Net loans	0	0
Restricted investment in bank stocks
Accrued interest receivable	32,958	29,640
Derivative assets	0	0
Financial instruments - liabilities
Deposits	0	0
Short-term borrowings	0	0
Long-term debt	0	0
Subordinated debt		0
Accrued interest payable	12,195	10,942
Derivative liabilities	0	0
Level 2
Financial instruments - assets
Cash and cash equivalents	0	0
Available-for-sale securities	484,130	416,314
Held-to-maturity securities	314,398	321,702
Equity securities	0	0
Loans held-for-sale	16,554	3,668
Net loans	0	0
Restricted investment in bank stocks	10,081	7,576
Accrued interest receivable	0	0
Derivative assets	8,168	9,007
Financial instruments - liabilities
Deposits	5,973,274	5,218,656
Short-term borrowings	31,500	20,833
Long-term debt	127	20,223
Subordinated debt		0
Accrued interest payable	0	0
Derivative liabilities	7,865	8,796
Level 3
Financial instruments - assets
Cash and cash equivalents	0	0
Available-for-sale securities	0	0
Held-to-maturity securities	0	0
Equity securities	0	0
Loans held-for-sale	0	0
Net loans	5,508,561	4,866,731
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
Accrued interest payable	0	0
Derivative liabilities	0	0
Carrying Amount
Financial instruments - assets
Cash and cash equivalents	141,190	98,918
Available-for-sale securities	484,130	416,314
Held-to-maturity securities	340,957	347,285
Equity securities	5,412	5,446
Loans held-for-sale	16,554	3,668
Net loans	5,468,835	4,826,747
Restricted investment in bank stocks	10,081	7,576
Accrued interest receivable	32,958	29,640
Derivative assets	8,168	9,007
Financial instruments - liabilities
Deposits	5,970,967	5,214,663
Short-term borrowings	31,500	20,833
Long-term debt	141	20,222
Subordinated debt		0
Accrued interest payable	12,195	10,942
Derivative liabilities	7,865	8,796
Estimated Fair Value
Financial instruments - assets
Cash and cash equivalents	141,190	98,918
Available-for-sale securities	484,130	416,314
Held-to-maturity securities	314,398	321,702
Equity securities	5,412	5,446
Loans held-for-sale	16,554	3,668
Net loans	5,508,561	4,866,731
Restricted investment in bank stocks	10,081	7,576
Accrued interest receivable	32,958	29,640
Derivative assets	8,168	9,007
Financial instruments - liabilities
Deposits	5,973,274	5,218,656
Short-term borrowings	31,500	20,833
Long-term debt	127	20,223
Subordinated debt		0
Accrued interest payable	12,195	10,942
Derivative liabilities	$ 7,865	$ 8,796