Fair value estimates - Carrying and Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Investment securities:
Available-for-sale	$ 336,449	$ 295,911
Common equity securities	142	138
Held-to-maturity	7,294	7,513
Loans held for sale	1,545	837
Mortgage servicing rights	835	838
Financial liabilities:
Subordinated debentures	33,000	33,000
Carrying Value
Financial assets:
Cash and due from banks	248,051	228,192
Investment securities:
Available-for-sale	336,449	295,911
Common equity securities	142	138
Held-to-maturity	7,104	7,225
Loans held for sale	1,545	837
Net loans	2,210,087	2,150,638
Accrued interest receivable	7,844	8,255
Mortgage servicing rights	835	838
Restricted equity securities (FHLB and other)	3,125	5,397
Interest rate floor	1,303	1,678
Interest rate swaps	10,023	13,693
Total assets	2,826,508	2,712,802
Financial liabilities:
Deposits	2,611,766	2,437,113
Long-term debt	3,752	14,769
Subordinated debentures	33,000	33,000
Accrued interest payable	469	736
Interest rate swap	9,777	14,099
Total liabilities	2,658,764	2,499,717
Fair Value
Financial assets:
Cash and due from banks	248,051	228,192
Investment securities:
Available-for-sale	336,449	295,911
Common equity securities	142	138
Held-to-maturity	7,294	7,513
Loans held for sale	1,545	837
Net loans	2,183,217	2,145,752
Accrued interest receivable	7,844	8,255
Mortgage servicing rights	1,264	1,269
Restricted equity securities (FHLB and other)	3,125	5,397
Interest rate floor	1,303	1,678
Interest rate swaps	10,023	13,693
Total assets	2,800,257	2,708,635
Financial liabilities:
Deposits	2,614,117	2,441,014
Long-term debt	3,890	15,073
Subordinated debentures	32,733	33,096
Accrued interest payable	469	736
Interest rate swap	9,777	14,099
Total liabilities	2,660,986	2,504,018
Level 1
Financial assets:
Cash and due from banks	248,051	228,192
Investment securities:
Available-for-sale	16,743	18,905
Common equity securities	142	138
Level 2
Investment securities:
Available-for-sale	319,706	277,006
Held-to-maturity	7,294	7,513
Loans held for sale	1,545	837
Accrued interest receivable	7,844	8,255
Mortgage servicing rights	1,264	1,269
Restricted equity securities (FHLB and other)	3,125	5,397
Interest rate floor	1,303	1,678
Interest rate swaps	10,023	13,693
Financial liabilities:
Deposits	2,614,117	2,441,014
Long-term debt	3,890	15,073
Subordinated debentures	32,733	33,096
Accrued interest payable	469	736
Interest rate swap	9,777	14,099
Level 3
Investment securities:
Net loans	$ 2,183,217	$ 2,145,752

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.