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v3.23.1

Summary of significant accounting policies - Adoption of new accounting standard (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Jan. 01, 2023 | Dec. 31, 2022 | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | --- | --- | --- | ---
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Allowance for credit losses | $ 25,444 |  | $ 27,472 | $ 28,407 | $ 28,383
Stockholders' equity | 328,634 |  | 315,350 | $ 320,461 | $ 340,126
Accrued interest receivable on loans | 9,800 |  |  |  |
Accrued interest receivable on available of sale securities | 1,600 |  |  |  |
Accrued interest receivable on held to maturity securities | 191 |  |  |  |
Cumulative impact of adoption | ASU 2016-13 |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Allowance for credit losses |  | $ 3,000 | $ (3,263) |  |
Stockholders' equity | $ 2,364 | $ 2,400 |  |  |

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