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Investments - Summary of Amortized Cost and Fair Values of Fixed Maturity Securities (Details) - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Cost | $ 31,805 | $ 31,811
Gross unrealized gains | 657 | 242
Gross unrealized losses | (69) | (47)
Fair value | 32,393 | 32,006
U.S. Treasury securities, obligations of U.S. Government agencies and Municipalities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Cost | 26,486 | 26,487
Gross unrealized gains | 586 | 174
Gross unrealized losses | (4) | (39)
Fair value | 27,068 | 26,622
Corporate debt |  |
Debt Securities, Available-for-sale [Line Items] |  |
Cost | 5,319 | 5,324
Gross unrealized gains | 71 | 68
Gross unrealized losses | (65) | (8)
Fair value | $ 5,325 | $ 5,384

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- Definition Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27161-111563 + Details
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