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Fair value of financial instruments - Additional Quantitative Information about Assets Measured at Fair Value on Nonrecurring Basis (Details) - Nonrecurring Basis - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Fair Value Inputs, Assets, Quantitative Information |  |
Other real estate owned | $ 738 |
Level 3 |  |
Fair Value Inputs, Assets, Quantitative Information |  |
Other real estate owned | 738 |
Loans individually evaluated for credit loss | Level 3 |  |
Fair Value Inputs, Assets, Quantitative Information |  |
Assets measured at fair value | $ 22,164 | $ 4,740
Loans individually evaluated for credit loss | Level 3 | Minimum |  |
Fair Value Inputs, Assets, Quantitative Information |  |
Range and weighted average of appraisal adjustments | 3.00% | 22.80%
Range and weighted average of liquidation expenses | 0.00% | 3.00%
Loans individually evaluated for credit loss | Level 3 | Maximum |  |
Fair Value Inputs, Assets, Quantitative Information |  |
Range and weighted average of appraisal adjustments | 111.90% | 82.40%
Range and weighted average of liquidation expenses | 6.00% | 6.00%
Loans individually evaluated for credit loss | Level 3 | Weighted Average |  |
Fair Value Inputs, Assets, Quantitative Information |  |
Range and weighted average of appraisal adjustments | 59.60% | 63.60%
Range and weighted average of liquidation expenses | 5.60% | 5.20%
Other Real Estate Owned | Level 3 |  |
Fair Value Inputs, Assets, Quantitative Information |  |
Assets measured at fair value | $ 738 |
Other Real Estate Owned | Level 3 | Minimum |  |
Fair Value Inputs, Assets, Quantitative Information |  |
Range and weighted average of appraisal adjustments | 0.00% |
Range and weighted average of liquidation expenses | 3.00% |
Other Real Estate Owned | Level 3 | Maximum |  |
Fair Value Inputs, Assets, Quantitative Information |  |
Range and weighted average of appraisal adjustments | 10.00% |
Range and weighted average of liquidation expenses | 6.00% |
Other Real Estate Owned | Level 3 | Weighted Average |  |
Fair Value Inputs, Assets, Quantitative Information |  |
Range and weighted average of appraisal adjustments | 9.70% |
Range and weighted average of liquidation expenses | 5.00% |

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