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Fair value of financial instruments (Tables) | 12 Months Ended
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Dec. 31, 2021
Fair value of financial instruments |
Schedule of assets and liabilities measured at fair value on a recurring basis | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Fair Value Measurement Using |
​ | ​ | ​ | ​ | Quoted Prices in | ​ | Significant | ​ | Significant |
​ | ​ | ​ | ​ | Active Markets for | ​ | Other Observable | ​ | Unobservable |
​ | ​ | ​ | ​ | Identical Assets | ​ | Inputs | ​ | Inputs |
December 31, 2021 |  | Amount |  | (Level 1) |  | (Level 2) |  | (Level 3) |
U.S. Treasury securities |  | $ | 191,574 |  | $ | 191,574 |  | ​ | ​ |  | $ | ​ | ​
U.S. government-sponsored enterprises | ​ | ​ | 33,778 | ​ | ​ | ​ | ​ | $ | 33,778 | ​ | ​ | ​ | ​
State and municipals: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Taxable | ​ |  | 68,978 | ​ | ​ | ​ | ​ |  | 68,978 | ​ | ​ | ​ | ​
Tax-exempt | ​ |  | 98,250 | ​ | ​ | ​ | ​ |  | 98,250 | ​ | ​ | ​ | ​
Mortgage-backed securities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
U.S. government agencies | ​ |  | 1,843 | ​ | ​ | ​ | ​ |  | 1,843 | ​ | ​ | ​ | ​
U.S. government-sponsored enterprises | ​ |  | 119,980 | ​ | ​ | ​ | ​ |  | 119,980 | ​ | ​ | ​ | ​
Corporate debt securities | ​ | ​ | 2,918 | ​ | ​ | ​ | ​ | ​ | 2,918 | ​ | ​ | ​ | ​
Common equity securities | ​ | ​ | 140 | ​ | ​ | 140 | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total investment securities | ​ | $ | 517,461 | ​ | $ | 191,714 | ​ | $ | 325,747 | ​ | $ | ​ | ​
Loan held for sale | ​ | $ | 408 | ​ | ​ | ​ | ​ | $ | 408 | ​ | ​ | ​ | ​
Interest rate floor-other assets | ​ | $ | 844 | ​ | ​ | ​ | ​ | $ | 844 | ​ | ​ | ​ | ​
Interest rate swap-other assets | ​ | $ | 9,026 | ​ | ​ | ​ | ​ | $ | 9,026 | ​ | ​ | ​ | ​
Interest rate swap-other liabilities | ​ | $ | (8,811) | ​ | ​ | ​ | ​ | $ | (8,811) | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Fair Value Measurement Using |
​ | ​ | ​ | ​ | ​ | Quoted Prices in | ​ | Significant | ​ | Significant |
​ | ​ | ​ | ​ | Active Markets for | ​ | Other Observable | ​ | Unobservable |
​ | ​ | ​ | ​ | Identical Assets | ​ | Inputs | ​ | Inputs |
December 31, 2020 |  | Amount |  | (Level 1) |  | (Level 2) |  | (Level 3) |
U.S. Treasury securities |  | $ | 18,905 |  | $ | 18,905 |  | ​ | ​ |  | $ | ​ | ​
U.S. government-sponsored enterprises | ​ | ​ | 65,188 | ​ | ​ | ​ | ​ | $ | 65,188 | ​ | ​ | ​ | ​
State and municipals: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Taxable | ​ |  | 55,366 | ​ | ​ | ​ | ​ |  | 55,366 | ​ | ​ | ​ | ​
Tax-exempt | ​ |  | 56,994 | ​ | ​ | ​ | ​ |  | 56,994 | ​ | ​ | ​ | ​
Mortgage-backed securities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
U.S. government agencies | ​ |  | 3,707 | ​ | ​ | ​ | ​ |  | 3,707 | ​ | ​ | ​ | ​
U.S. government-sponsored enterprises | ​ |  | 94,751 | ​ | ​ | ​ | ​ |  | 94,751 | ​ | ​ | ​ | ​
Corporate debt securities | ​ | ​ | 1,000 | ​ | ​ | ​ | ​ | ​ | 1,000 | ​ | ​ | ​ | ​
Common equity securities | ​ |  | 138 | ​ | ​ | 138 | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total investment securities | ​ | $ | 296,049 | ​ | $ | 19,043 | ​ | $ | 277,006 | ​ | $ | ​ | ​
Loan held for sale | ​ | $ | 837 | ​ | ​ | ​ | ​ | $ | 837 | ​ | ​ | ​ | ​
Interest rate floor-other assets | ​ | $ | 1,678 | ​ | ​ | ​ | ​ | $ | 1,678 | ​ | ​ | ​ | ​
Interest rate swap-other assets | ​ | $ | 13,693 | ​ | ​ | ​ | ​ | $ | 13,693 | ​ | ​ | ​ | ​
Interest rate swap-other liabilities | ​ | $ | (14,099) | ​ | ​ | ​ | ​ | $ | (14,099) | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Schedule of assets and liabilities measured at fair value on a nonrecurring basis | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Fair Value Measurement Using |
​ | ​ | ​ | ​ | ​ | Quoted Prices in | ​ | Significant | ​ | Significant |
​ | ​ | ​ | ​ | Active Markets for | ​ | Other Observable | ​ | Unobservable |
​ | ​ | ​ | ​ | Identical Assets | ​ | Inputs | ​ | Inputs |
December 31, 2021 |  | Amount |  | (Level 1) |  | (Level 2) |  | (Level 3) |
Impaired loans |  | $ | 780 |  | ​ | ​ |  | ​ | ​ |  | $ | 780 | ​
Other real estate owned | ​ | $ | 487 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | $ | 487 | ​
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Fair Value Measurement Using |
​ | ​ | ​ | ​ | ​ | Quoted Prices in | ​ | Significant Other | ​ | Significant |
​ | ​ | ​ | ​ | Active Markets for | ​ | Observable | ​ | Unobservable |
​ | ​ | ​ | ​ | Identical Assets | ​ | Inputs | ​ | Inputs |
December 31, 2020 |  | Amount |  | (Level 1) |  | (Level 2) |  | (Level 3) |
Impaired loans |  | $ | 2,884 |  | ​ | ​ |  | ​ | ​ |  | $ | 2,884 | ​
Other real estate owned | ​ | $ | 527 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | $ | 527 | ​
Schedule of additional quantitative information about assets measured at fair value on a nonrecurring basis | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Quantitative Information about Level 3 Fair Value Measurements |
​ | ​ | Fair Value | ​ | ​ | ​ | ​ | ​ | Range |
December 31, 2021 |  | Estimate |  | Valuation Techniques |  | Unobservable Input |  | (Weighted Average) |
Impaired loans |  | $ | 780 |  | Appraisal of collateral |  | Appraisal adjustments |  | 6.4% to 97.0% (65.2)% | ​
​ | ​ | ​ | ​ | ​ | ​ |  | Liquidation expenses |  | 3.0% to 6.0% (5.1)% | ​
Other real estate owned | ​ | $ | 487 |  | Appraisal of collateral |  | Appraisal adjustments |  | 35.9% to 35.9% (35.9)% | ​
​ | ​ | ​ | ​ | ​ | ​ |  | Liquidation expenses |  | 3.0% to 6.0% (5.0)% | ​
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Quantitative Information about Level 3 Fair Value Measurements |
​ | ​ | Fair Value | ​ | ​ | ​ | ​ | ​ | Range |
December 31, 2020 |  | Estimate |  | Valuation Techniques |  | Unobservable Input |  | (Weighted Average) |
Impaired loans |  | $ | 2,884 |  | Appraisal of collateral |  | Appraisal adjustments |  | 9.0% to 97.0% (28.2)% | ​
​ | ​ | ​ | ​ | ​ | ​ |  | Liquidation expenses |  | 3.0% to 6.0% (5.5)% | ​
Other real estate owned | ​ | $ | 527 |  | Appraisal of collateral |  | Appraisal adjustments |  | 3.1% to 58.1% (29.9)% | ​
​ | ​ | ​ | ​ | ​ | ​ |  | Liquidation expenses |  | 3.0% to 6.0% (5.0)% | ​
Schedule of carrying and fair values of financial instruments | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ |  | ​ | ​ |  | Fair Value Hierarchy |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Quoted |  | ​ | ​ |  | ​ | ​ |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Prices in | ​ | ​ | ​ | ​ | ​ | ​ |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Active | ​ | Significant | ​ | ​ | ​ |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Markets for | ​ | Other | ​ | Significant |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Identical | ​ | Observable | ​ | Unobservable |
​ | ​ | Carrying | ​ | Fair | ​ | Assets | ​ | Inputs | ​ | Inputs |
December 31, 2021 |  | Value |  | Value |  | (level 1) |  | (level 2) |  | (Level 3) |
Financial assets: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Cash and due from banks | ​ | $ | 279,933 | ​ | $ | 279,933 | ​ | $ | 279,933 | ​ | ​ | ​ | ​ | ​ | ​ | ​
Investment securities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Available-for-sale | ​ |  | 517,321 | ​ |  | 517,321 | ​ | ​ | 191,574 | ​ | $ | 325,747 | ​ | ​ | ​ | ​
Common equity securities | ​ | ​ | 140 | ​ | ​ | 140 | ​ | ​ | 140 | ​ | ​ | ​ | ​ | ​ | ​ | ​
Held-to-maturity | ​ |  | 71,213 | ​ |  | 70,446 | ​ | ​ | ​ | ​ |  | 70,446 | ​ | ​ | ​ | ​
Loans held for sale | ​ |  | 408 | ​ |  | 408 | ​ | ​ | ​ | ​ |  | 408 | ​ | ​ | ​ | ​
Net loans | ​ |  | 2,300,790 | ​ |  | 2,261,586 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | $ | 2,261,586 | ​
Accrued interest receivable | ​ |  | 8,528 | ​ |  | 8,528 | ​ | ​ | ​ | ​ |  | 8,528 | ​ | ​ | ​ | ​
Mortgage servicing rights | ​ |  | 882 | ​ |  | 1,357 | ​ | ​ | ​ | ​ |  | 1,357 | ​ | ​ | ​ | ​
Restricted equity securities (FHLB and other) | ​ | ​ | 4,045 | ​ |  | 4,045 | ​ | ​ | ​ | ​ |  | 4,045 | ​ | ​ | ​ | ​
Interest rate floor | ​ | ​ | 844 | ​ | ​ | 844 | ​ | ​ | ​ | ​ | ​ | 844 | ​ | ​ | ​ | ​
Interest rate swaps | ​ |  | 9,026 | ​ |  | 9,026 | ​ | ​ | ​ | ​ |  | 9,026 | ​ | ​ | ​ | ​
Total | ​ | $ | 3,193,130 | ​ | $ | 3,153,634 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Financial liabilities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Deposits | ​ | $ | 2,963,397 | ​ | $ | 2,963,547 | ​ | ​ | ​ | ​ | $ | 2,963,547 | ​ | ​ | ​ | ​
Long-term debt | ​ |  | 2,711 | ​ |  | 2,778 | ​ | ​ | ​ | ​ |  | 2,778 | ​ | ​ | ​ | ​
Subordinated debentures | ​ |  | 33,000 | ​ |  | 32,337 | ​ | ​ | ​ | ​ |  | 32,337 | ​ | ​ | ​ | ​
Accrued interest payable | ​ | ​ | 408 | ​ |  | 408 | ​ | ​ | ​ | ​ | ​ | 408 | ​ | ​ | ​ | ​
Interest rate swaps | ​ |  | 8,811 | ​ |  | 8,811 | ​ | ​ | ​ | ​ | ​ | 8,811 | ​ | ​ | ​ | ​
Total | ​ | $ | 3,008,327 | ​ | $ | 3,007,881 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ |  | ​ | ​ |  | Fair Value Hierarchy |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Quoted |  | ​ | ​ |  | ​ | ​ |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Prices in | ​ | ​ | ​ | ​ | ​ | ​ |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Active | ​ | Significant | ​ | ​ | ​ |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Markets for | ​ | Other | ​ | Significant |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Identical | ​ | Observable | ​ | Unobservable |
​ | ​ | Carrying | ​ | Fair | ​ | Assets | ​ | Inputs | ​ | Inputs |
December 31, 2020 |  | Value |  | Value |  | (level 1) |  | (level 2) |  | (Level 3) |
Financial assets: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Cash and due from banks | ​ | $ | 228,192 | ​ | $ | 228,192 | ​ | $ | 228,192 | ​ | ​ | ​ | ​ | ​ | ​ | ​
Investment securities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Available-for-sale | ​ |  | 295,911 | ​ |  | 295,911 | ​ | ​ | 18,905 | ​ | $ | 277,006 | ​ | ​ | ​ | ​
Common equity securities | ​ | ​ | 138 | ​ | ​ | 138 | ​ | ​ | 138 | ​ | ​ | ​ | ​ | ​ | ​ | ​
Held-to-maturity | ​ |  | 7,225 | ​ |  | 7,513 | ​ | ​ | ​ | ​ |  | 7,513 | ​ | ​ | ​ | ​
Loans held for sale | ​ |  | 837 | ​ |  | 837 | ​ | ​ | ​ | ​ |  | 837 | ​ | ​ | ​ | ​
Net loans | ​ |  | 2,150,638 | ​ |  | 2,145,752 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | $ | 2,145,752 | ​
Accrued interest receivable | ​ |  | 8,255 | ​ |  | 8,255 | ​ | ​ | ​ | ​ |  | 8,255 | ​ | ​ | ​ | ​
Mortgage servicing rights | ​ |  | 838 | ​ |  | 1,269 | ​ | ​ | ​ | ​ |  | 1,269 | ​ | ​ | ​ | ​
Restricted equity securities (FHLB and other) | ​ |  | 5,397 | ​ |  | 5,397 | ​ | ​ | ​ | ​ |  | 5,397 | ​ | ​ | ​ | ​
Interest rate floor | ​ | ​ | 1,678 | ​ | ​ | 1,678 | ​ | ​ | ​ | ​ | ​ | 1,678 | ​ | ​ | ​ | ​
Interest rate swaps | ​ | ​ | 13,693 | ​ | ​ | 13,693 | ​ | ​ | ​ | ​ | ​ | 13,693 | ​ | ​ | ​ | ​
Total | ​ | $ | 2,712,802 | ​ | $ | 2,708,635 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Financial liabilities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Deposits | ​ | $ | 2,437,113 | ​ | $ | 2,441,014 | ​ | ​ | ​ | ​ | $ | 2,441,014 | ​ | ​ | ​ | ​
Long-term debt | ​ |  | 14,769 | ​ |  | 15,073 | ​ | ​ | ​ | ​ |  | 15,073 | ​ | ​ | ​ | ​
Subordinated debentures | ​ | ​ | 33,000 | ​ | ​ | 33,096 | ​ | ​ | ​ | ​ | ​ | 33,096 | ​ | ​ | ​ | ​
Accrued interest payable | ​ |  | 736 | ​ |  | 736 | ​ | ​ | ​ | ​ | ​ | 736 | ​ | ​ | ​ | ​
Interest rate swaps | ​ | ​ | 14,099 | ​ | ​ | 14,099 | ​ | ​ | ​ | ​ | ​ | 14,099 | ​ | ​ | ​ | ​
Total | ​ | $ | 2,499,717 | ​ | $ | 2,504,018 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​

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- Definition Tabular disclosure of input and valuation technique used to measure fair value and change in valuation approach and technique for each separate class of asset and liability measured on recurring and nonrecurring basis. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of assets and liabilities by class, including financial instruments measured at fair value that are classified in shareholders' equity, if any, that are measured at fair value on a nonrecurring basis in periods after initial recognition (for example, impaired assets). Disclosures may include, but are not limited to: (a) the fair value measurements recorded and the reasons for the measurements and (b) the level within the fair value hierarchy in which the fair value measurements are categorized in their entirety (levels 1, 2, 3). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=123594938&loc=d3e13467-108611 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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