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v3.20.4

Other Assets (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2020 USD ($) | Dec. 31, 2020 USD ($) Reportingunit | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
Goodwill [Line Items] |  |  |  |
Goodwill, impairment loss |  | $ 132,128 | $ 0 | $ 0
Goodwill, impairment loss |  | $ 0 |  |
Accumulated Impairment Losses [Member] | Natural Disasters and Other Casualty Events [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill, impairment loss | $ 132,200 |  |  |
Accumulated Impairment Losses [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Natural Disasters and Other Casualty Events [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Number of reporting units | Reportingunit |  | 269 |  |
Fair Value lower than carrying value | Reportingunit |  | 87 |  |

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