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Fair value of financial instruments - Schedule of Assets and Liabilities Measured at Fair Value on Nonrecurring Basis (Details) - Nonrecurring Basis - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Impaired loans | $ 780 | $ 2,884
Other real estate owned | 487 | 527
Level 3 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Impaired loans | 780 | 2,884
Other real estate owned | $ 487 | $ 527

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