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Investments - Amortized Cost and Fair Value of Fixed Maturity Securities by Contractual Maturity (Detail) - USD ($) $ in Thousands | Jun. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Amortized cost |  |
Due in one year or less | $ 2,877 | $ 4,768
Due after one year through five years | 24,706 | 17,584
Due after five years | 0 | 0
Amortized Cost, Total | 27,583 | 22,352
Fair value |  |
Due in one year or less | 2,875 | 4,743
Due after one year through five years | 24,896 | 17,394
Due after five years | 0 | 0
Fair Value, Total | $ 27,771 | $ 22,137

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