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v3.21.1

Other Assets (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2021 Reportingunit | Mar. 31, 2020 USD ($) | Dec. 31, 2020 USD ($)
Goodwill [Line Items] |  |  |
Goodwill, impairment loss | $ |  | $ 132,128 |
Accumulated Impairment Losses | Natural Disasters and Other Casualty Events [Member] |  |  |
Goodwill [Line Items] |  |  |
Goodwill, impairment loss | $ |  |  | $ 132,200
Accumulated Impairment Losses | 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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