Fair Value of Financial Instruments - Carrying Amounts and Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Financial assets:
Cash and cash equivalents	$ 768,108	$ 730,427
Securities available for sale	300,746	310,418
Held to maturity securities	4,134	4,389
Net loans	4,865,671	4,803,366
Accrued interest receivable	14,683	13,828
Financial liabilities:
Demand deposits	811,637	814,908
Interest bearing deposits	4,833,997	4,736,927
Short-term borrowings	112,930	120,054
Accrued interest payable	3,781	3,646
Carrying Value [Member]
Financial assets:
Cash and cash equivalents	768,108	730,427
Securities available for sale	300,746	310,418
Held to maturity securities	4,097	4,339
Federal Home Loan Bank stock	6,601	6,601
Net loans	5,237,184	5,200,255
Accrued interest receivable	14,684	13,828
Financial liabilities:
Demand deposits	811,637	814,908
Interest bearing deposits	4,840,716	4,742,509
Short-term borrowings	112,930	120,054
Accrued interest payable	3,781	3,646
Level 1 [Member]
Financial assets:
Cash and cash equivalents	768,108	730,427
Securities available for sale		0
Held to maturity securities	0	0
Net loans	0	0
Accrued interest receivable	789	325
Financial liabilities:
Demand deposits	811,637	814,908
Interest bearing deposits	2,591,599	2,604,094
Short-term borrowings	0	0
Accrued interest payable	141	159
Level 2 [Member]
Financial assets:
Cash and cash equivalents	0	0
Securities available for sale	300,746	310,418
Held to maturity securities	4,134	4,389
Net loans	0	0
Accrued interest receivable	1,531	1,266
Financial liabilities:
Demand deposits	0	0
Interest bearing deposits	2,242,398	2,132,833
Short-term borrowings	112,930	120,054
Accrued interest payable	3,640	3,487
Level 3 [Member]
Financial assets:
Cash and cash equivalents	0	0
Securities available for sale	0	0
Held to maturity securities	0	0
Net loans	4,865,671	4,803,366
Accrued interest receivable	12,363	12,237
Financial liabilities:
Demand deposits	0	0
Interest bearing deposits	0	0
Short-term borrowings	0	0
Accrued interest payable	$ 0	$ 0