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Investments - Amortized Cost and Fair Value of Fixed Maturity Securities by Contractual Maturity (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Amortized cost |  |
Due in one year or less | $ 6,348 | $ 11,214
Due after one year through five years | 30,410 | 23,348
Due after five years | 1,000 | 1,000
Amortized Cost, Total | 37,758 | 35,562
Fair value |  |
Due in one year or less | 6,383 | 11,283
Due after one year through five years | 30,771 | 23,976
Due after five years | 963 | 995
Fair Value, Total | $ 38,117 | $ 36,254

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