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Derivatives - Schedule of listing currency, fair value and notional amounts of derivative instruments (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Offsettting Assets and Liabilities [Line Items] |  |
Derivative assets, at fair value | $ 1,153 | $ 0
Derivative assets, notional amount | 4,150 | 0
Derivative liabilities, at fair value | 1,013 | 31
Derivative liabilities, notional amount | 35,704 | 20,000
Reinsurance contracts accounted for as derivative assets [Member] |  |
Offsettting Assets and Liabilities [Line Items] |  |
Derivative assets, at fair value | 1,153 | 0
Derivative assets, notional amount | 4,150 | 0
Derivative liabilities (embedded) |  |
Offsettting Assets and Liabilities [Line Items] |  |
Derivative liabilities, at fair value | 5 | 31
Derivative liabilities, notional amount | 20,000 | 20,000
Reinsurance contracts accounted for as derivative liabilities [Member] |  |
Offsettting Assets and Liabilities [Line Items] |  |
Derivative liabilities, at fair value | 1,008 | 0
Derivative liabilities, notional amount | $ 15,704 | $ 0

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