Fair value of financial instruments - Carrying and Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Investment securities:
Available-for-sale	$ 394,413	$ 398,927
Common equity securities	91	98
Held-to-maturity	69,989	71,698
Mortgage servicing rights	861	870
Financial liabilities:
Subordinated debentures	33,000	33,000
Carrying Value
Financial assets:
Cash and due from banks	109,968	187,365
Investment securities:
Available-for-sale	394,413	398,927
Common equity securities	91	98
Held-to-maturity	83,306	84,851
Loans held for sale	300	250
Net loans	2,835,815	2,828,002
Accrued interest receivable	13,565	12,734
Mortgage servicing rights	861	870
Restricted equity securities (FHLB and other)	4,981	5,180
Interest rate swaps	20,911	19,278
Total assets	3,464,211	3,537,555
Financial liabilities:
Deposits	3,203,938	3,279,037
Short-term borrowings	20,260	17,590
Long-term debt	25,000	25,000
Subordinated debentures	33,000	33,000
Accrued interest payable	5,327	5,765
Interest rate swap	20,483	18,808
Total liabilities	3,308,008	3,379,200
Fair Value
Financial assets:
Cash and due from banks	109,968	187,365
Investment securities:
Available-for-sale	394,413	398,927
Common equity securities	91	98
Held-to-maturity	69,989	71,698
Loans held for sale	300	250
Net loans	2,617,393	2,593,151
Accrued interest receivable	13,565	12,734
Mortgage servicing rights	1,727	1,745
Restricted equity securities (FHLB and other)	4,981	5,180
Interest rate swaps	20,911	19,278
Total assets	3,233,338	3,290,426
Financial liabilities:
Deposits	3,199,614	3,274,774
Short-term borrowings	20,260	17,590
Long-term debt	24,756	24,924
Subordinated debentures	32,176	45,504
Accrued interest payable	5,327	5,765
Interest rate swap	20,483	18,808
Total liabilities	3,302,616	3,387,365
Level 1
Financial assets:
Cash and due from banks	109,968	187,365
Investment securities:
Available-for-sale	183,899	184,057
Common equity securities	91	98
Level 2
Investment securities:
Available-for-sale	210,514	214,870
Held-to-maturity	69,989	71,698
Loans held for sale	300
Accrued interest receivable	13,565	12,734
Mortgage servicing rights	1,727	1,745
Restricted equity securities (FHLB and other)	4,981	5,180
Interest rate swaps	20,911	19,278
Financial liabilities:
Deposits	3,199,614	3,274,774
Short-term borrowings	20,260	17,590
Long-term debt	24,756	24,924
Subordinated debentures	32,176	45,504
Accrued interest payable	5,327	5,765
Interest rate swap	20,483	18,808
Level 3
Investment securities:
Net loans	$ 2,617,393	$ 2,593,151

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.