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Summary of significant accounting policies - Nature of operations and Basis of presentation (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 USD ($) Office
Summary of significant accounting policies |
Number of full-service community banking offices | Office | 26
Reclassification of prior period items amounts effect on net income | $ | $ 0

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- Definition The number of full-service community banking offices. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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- Definition The amount of a reclassification adjustment made to prior period financial statement amounts. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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