Fair value of financial instruments - Carrying and Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Investment securities:
Available for sale, Fair Value	$ 534,521	$ 526,329
Held to maturity	63,545	65,152
Common equity securities	2,473	2,430
Mortgage servicing rights	1,219	1,304
Financial liabilities:
Subordinated debt	83,111	33,000
Junior subordinated debt	8,114	8,039
Carrying Value
Financial assets:
Cash and due from banks	179,923	135,851
Investment securities:
Available for sale, Fair Value	534,521	526,329
Held to maturity	73,286	78,184
Common equity securities	2,473	2,430
Loans held for sale	816
Net loans	3,976,524	3,951,729
Accrued interest receivable	16,995	15,632
Mortgage servicing rights	1,219	1,304
Restricted equity securities (FHLB and other)	13,517	10,220
Other assets - interest rate swaps	15,708	20,537
Total assets	4,814,982	4,742,216
Financial liabilities:
Deposits	4,289,731	4,407,552
Short-term borrowings	76,310	15,900
Long-term debt	137,029	98,637
Subordinated debt	83,111	33,000
Junior subordinated debt	8,114	8,039
Accrued interest payable	7,976	5,503
Other liabilities - interest rate swaps	15,470	20,151
Total liabilities	4,617,741	4,588,782
Fair Value
Financial assets:
Cash and due from banks	179,923	135,851
Investment securities:
Available for sale, Fair Value	534,521	526,329
Held to maturity	63,545	65,152
Common equity securities	2,473	2,430
Loans held for sale	816
Net loans	3,909,350	3,830,062
Accrued interest receivable	16,995	15,632
Mortgage servicing rights	2,163	2,314
Restricted equity securities (FHLB and other)	13,517	10,220
Other assets - interest rate swaps	15,708	20,537
Total assets	4,739,011	4,608,527
Financial liabilities:
Deposits	4,287,471	4,404,117
Short-term borrowings	76,173	15,900
Long-term debt	137,803	98,875
Subordinated debt	85,761	32,506
Junior subordinated debt	7,342	8,167
Accrued interest payable	7,976	5,503
Other liabilities - interest rate swaps	15,470	20,151
Total liabilities	4,617,996	4,585,219
Level 1
Financial assets:
Cash and due from banks	179,923	135,851
Investment securities:
Available for sale, Fair Value	128,507	167,551
Common equity securities	2,473	2,430
Level 2
Investment securities:
Available for sale, Fair Value	404,042	354,156
Held to maturity	63,545	65,152
Loans held for sale	816
Accrued interest receivable	16,995	15,632
Mortgage servicing rights	2,163	2,314
Restricted equity securities (FHLB and other)	13,517	10,220
Other assets - interest rate swaps	15,708	20,537
Financial liabilities:
Deposits	4,287,471	4,404,117
Short-term borrowings	76,173	15,900
Long-term debt	137,803	98,875
Subordinated debt	85,761	32,506
Junior subordinated debt	7,342	8,167
Accrued interest payable	7,976	5,503
Other liabilities - interest rate swaps	15,470	20,151
Level 3
Investment securities:
Available for sale, Fair Value	1,972	4,622
Net loans	$ 3,909,350	$ 3,830,062

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents accrued interest payable as of the balance sheet date.

No definition available.