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Investment securities - Equity Securities Portfolio (Details) $ in Thousands | Mar. 31, 2021 USD ($) security | Dec. 31, 2020 USD ($)
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Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Number of equity securities portfolio consisting of stock of other financial institutions | security | 1 |
Equity investments carried at fair value | $ 159 | $ 138
Fair value of equity portfolio in excess of cost basis | 5 |
Common equity securities. |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Equity investments carried at fair value | $ 159 | $ 138

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- Definition The amount the fair value of the equity portfolio exceeded the cost basis. + References No definition available. + Details
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- Definition The number of equity securities portfolio consisting of stock of other financial institutions. + References No definition available. + Details
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- Definition Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=99377092&loc=SL75136599-209740 + Details
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