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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 | Jun. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Fair Value Inputs, Assets, Quantitative Information |  |
Other real estate owned | $ 711 |
Loans individually evaluated for credit loss | 16,785 |
Level 3 |  |
Fair Value Inputs, Assets, Quantitative Information |  |
Other real estate owned | 711 | $ 738
Loans individually evaluated for credit loss | 16,785 |
Loans individually evaluated for credit loss |  |
Fair Value Inputs, Assets, Quantitative Information |  |
Loans individually evaluated for credit loss |  | 22,164
Loans individually evaluated for credit loss | Level 3 |  |
Fair Value Inputs, Assets, Quantitative Information |  |
Assets measured at fair value | 16,785 | 22,164
Loans individually evaluated for credit loss |  | 22,164
Other Real Estate Owned |  |
Fair Value Inputs, Assets, Quantitative Information |  |
Other real estate owned |  | 738
Other Real Estate Owned | Level 3 |  |
Fair Value Inputs, Assets, Quantitative Information |  |
Other real estate owned | $ 711 | $ 738
Measurement Input, Appraisal Adjustment | Loans individually evaluated for credit loss | Level 3 | Minimum |  |
Fair Value Inputs, Assets, Quantitative Information |  |
Range and weighted average of appraisal adjustments | 2.60% | 3.00%
Measurement Input, Appraisal Adjustment | Loans individually evaluated for credit loss | Level 3 | Maximum |  |
Fair Value Inputs, Assets, Quantitative Information |  |
Range and weighted average of appraisal adjustments | 98.20% | 111.90%
Measurement Input, Appraisal Adjustment | Loans individually evaluated for credit loss | Level 3 | Weighted Average |  |
Fair Value Inputs, Assets, Quantitative Information |  |
Range and weighted average of appraisal adjustments | 71.50% | 59.60%
Measurement Input, Appraisal Adjustment | Other Real Estate Owned | Level 3 | Minimum |  |
Fair Value Inputs, Assets, Quantitative Information |  |
Range and weighted average of appraisal adjustments | 0.00% | 0.00%
Measurement Input, Appraisal Adjustment | Other Real Estate Owned | Level 3 | Maximum |  |
Fair Value Inputs, Assets, Quantitative Information |  |
Range and weighted average of appraisal adjustments | 10.00% | 10.00%
Measurement Input, Appraisal Adjustment | Other Real Estate Owned | Level 3 | Weighted Average |  |
Fair Value Inputs, Assets, Quantitative Information |  |
Range and weighted average of appraisal adjustments | 9.70% | 9.70%
Measurement Input, Liquidation expenses | Loans individually evaluated for credit loss | Level 3 | Minimum |  |
Fair Value Inputs, Assets, Quantitative Information |  |
Range and weighted average of liquidation expenses | 3.00% | 0.00%
Measurement Input, Liquidation expenses | Loans individually evaluated for credit loss | Level 3 | Maximum |  |
Fair Value Inputs, Assets, Quantitative Information |  |
Range and weighted average of liquidation expenses | 6.00% | 6.00%
Measurement Input, Liquidation expenses | Loans individually evaluated for credit loss | Level 3 | Weighted Average |  |
Fair Value Inputs, Assets, Quantitative Information |  |
Range and weighted average of liquidation expenses | 5.60% | 5.60%
Measurement Input, Liquidation expenses | Other Real Estate Owned | Level 3 | Minimum |  |
Fair Value Inputs, Assets, Quantitative Information |  |
Range and weighted average of liquidation expenses | 3.00% | 3.00%
Measurement Input, Liquidation expenses | Other Real Estate Owned | Level 3 | Maximum |  |
Fair Value Inputs, Assets, Quantitative Information |  |
Range and weighted average of liquidation expenses | 6.00% | 6.00%
Measurement Input, Liquidation expenses | Other Real Estate Owned | Level 3 | Weighted Average |  |
Fair Value Inputs, Assets, Quantitative Information |  |
Range and weighted average of liquidation expenses | 5.00% | 5.00%

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