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Investment securities - Equity Securities Portfolio (Details) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 USD ($) security | Dec. 31, 2018 USD ($) | Dec. 31, 2019 USD ($)
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |  |
Number of equity securities portfolio consisting of stock of other financial institutions | security | 1 |  |
Proceeds from sale of equity holdings | $ 279 |  |
Gain on sale of equity holdings | 29 |  |
Equity investments carried at fair value | 138 |  | $ 423
Net unrealized gains recognized in AOCI |  | $ 3 |
Fair value of equity portfolio in excess of cost basis | 15 |  |
Common equity securities. |  |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |  |
Equity investments carried at fair value | $ 138 |  | $ 423

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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 The amount of other than temporary impairment losses on investments in equity securities which have been recognized in earnings during the period. + 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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