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Other comprehensive income (loss) (Tables) | 3 Months Ended
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Mar. 31, 2023
Equity [Abstract] |
Summary of Accumulated Other Comprehensive Income (Loss) | The changes in each component of accumulated other comprehensive income (loss), presented net of tax, were as follows (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Three Months Ended March 31, 2023
​ |  | ​ |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |  | Accumulated
​ | ​ | Securities | ​ | Securities | ​ | Fair Value | ​ | ​ | ​ | Other
​ | ​ | Available-for- | ​ | Transferred to | ​ | Municipal | ​ | Cash Flow | ​ | Comprehensive
​ |  | Sale |  | Held-to-Maturity |  | Security Hedges |  | Hedges |  | Income (Loss)
Beginning balance, December 31, 2022 |  | $ | (33,616) | ​ | $ | (742) | ​ | $ | — | ​ | $ | (966) | ​ | $ | (35,324)
​ | ​ |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Other comprehensive income | ​ |  | 6,138 | ​ | ​ | — | ​ |  | — | ​ | ​ | 536 | ​ |  | 6,674
Reclassification of amounts included in net income | ​ |  | — | ​ | ​ | 30 | ​ |  | — | ​ | ​ | — | ​ |  | 30
Net other comprehensive income during period | ​ |  | 6,138 | ​ | ​ | 30 | ​ |  | — | ​ |  | 536 | ​ |  | 6,704
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Ending balance, March 31, 2023 | ​ | $ | (27,478) | ​ | $ | (712) | ​ | $ | — | ​ | $ | (430) | ​ | $ | (28,620)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Three Months Ended March 31, 2022
​ |  | ​ |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |  | Accumulated
​ | ​ | Securities | ​ | Securities | ​ | Fair Value | ​ | ​ | ​ | Other
​ | ​ | Available-for- | ​ | Transferred to | ​ | Municipal | ​ | Cash Flow | ​ | Comprehensive
​ |  | Sale |  | Held-to-Maturity |  | Security Hedges |  | Hedges |  | Income (Loss)
Beginning balance, December 31, 2021 | ​ | $ | 25 | ​ | $ | 665 | ​ | $ | 753 | ​ | $ | — | ​ | $ | 1,443
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Other comprehensive income (loss) | ​ |  | (15,092) | ​ | ​ | (1,490) | ​ |  | (409) | ​ | ​ | — | ​ |  | (16,991)
Reclassification of amounts included in net income | ​ |  | — | ​ | ​ | (8) | ​ |  | — | ​ | ​ | — | ​ |  | (8)
Net other comprehensive income (loss) during period | ​ |  | (15,092) | ​ | ​ | (1,498) | ​ |  | (409) | ​ |  | — | ​ |  | (16,999)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Ending balance, March 31, 2022 | ​ | $ | (15,067) | ​ | $ | (833) | ​ | $ | 344 | ​ | $ | — | ​ | $ | (15,556)
​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

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