Fair Value - Carrying amounts and estimated fair value of financial instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Carrying amount and estimated fair value of financial instruments
Cash and due from banks	$ 87,438	$ 93,526
Federal funds sold	157	820
Securities available-for-sale	1,186,107	1,195,990
Restricted stock	18,761	17,555
Loans, net	3,858,240	3,717,843
Accrued interest receivable	26,526	26,934
Deposits	(4,610,086)	(4,723,356)
Short-term borrowings	(182,522)	(187,057)
Other borrowings	(170,453)	(29,693)
Accrued interest payable	(2,965)	(3,799)
Level 1
Carrying amount and estimated fair value of financial instruments
Cash and due from banks	36,798	35,889
Level 2
Carrying amount and estimated fair value of financial instruments
Cash and due from banks	50,640	57,637
Federal funds sold	157	820
Securities available-for-sale	1,183,264	1,192,289
Accrued interest receivable	6,577	6,543
Deposits	(4,610,086)	(4,723,356)
Short-term borrowings	(182,522)	(187,057)
Other borrowings	(170,453)	(29,693)
Accrued interest payable	(2,965)	(3,799)
Level 3
Carrying amount and estimated fair value of financial instruments
Securities available-for-sale	2,843	3,701
Loans, net	3,858,240	3,717,843
Accrued interest receivable	19,949	20,391
Carrying Value
Carrying amount and estimated fair value of financial instruments
Cash and due from banks	87,438	93,526
Federal funds sold	157	820
Securities available-for-sale	1,186,107	1,195,990
Restricted stock	18,761	17,555
Loans, net	3,919,990	3,790,409
Accrued interest receivable	26,526	26,934
Deposits	(4,615,305)	(4,718,914)
Short-term borrowings	(182,522)	(187,057)
Other borrowings	(170,453)	(28,120)
Accrued interest payable	$ (2,965)	$ (3,799)