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Fair value of financial instruments - Additional Quantitative Information about Assets Measured at Fair Value on Nonrecurring Basis (Details) - Nonrecurring Basis - Level 3 - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
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Impaired Loans |  |
Fair Value Inputs, Assets, Quantitative Information |  |
Assets, Fair Value Estimate | $ 780 | $ 2,884
Range and weighted average of appraisal adjustments | 65.20% | 28.20%
Range and weighted average of liquidation expenses | 5.10% | 5.50%
Impaired Loans | Minimum |  |
Fair Value Inputs, Assets, Quantitative Information |  |
Range and weighted average of appraisal adjustments | 6.40% | 9.00%
Range and weighted average of liquidation expenses | 3.00% | 3.00%
Impaired Loans | Maximum |  |
Fair Value Inputs, Assets, Quantitative Information |  |
Range and weighted average of appraisal adjustments | 97.00% | 97.00%
Range and weighted average of liquidation expenses | 6.00% | 6.00%
Other Real Estate Owned |  |
Fair Value Inputs, Assets, Quantitative Information |  |
Assets, Fair Value Estimate | $ 487 | $ 527
Range and weighted average of appraisal adjustments | 35.90% | 29.90%
Range and weighted average of liquidation expenses | 5.00% | 5.00%
Other Real Estate Owned | Minimum |  |
Fair Value Inputs, Assets, Quantitative Information |  |
Range and weighted average of appraisal adjustments | 35.90% | 3.10%
Range and weighted average of liquidation expenses | 3.00% | 3.00%
Other Real Estate Owned | Maximum |  |
Fair Value Inputs, Assets, Quantitative Information |  |
Range and weighted average of appraisal adjustments | 35.90% | 58.10%
Range and weighted average of liquidation expenses | 6.00% | 6.00%

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- Definition Represents the range and weighted average of liquidation expenses presented as a percent of the appraisal. + References No definition available. + Details
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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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