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Investments - Additional Information (Details) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2020 USD ($) Security | Dec. 31, 2019 USD ($) Security
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale Debt Securities | $ 35,899 | $ 32,006
Number of securities in unrealized loss position | Security | 5 | 10
Proceeds from sale of investment in fixed maturity securities | $ 5,300 |
Proceeds from Sale of Other Investments | 7,400 |
Investments on deposit with the state insurance department | 4,300 |
U.S. Treasury securities, obligations of U.S. Government agencies and municipalities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale Debt Securities | 29,263 | $ 26,622
U.S. Treasury securities, obligations of U.S. Government agencies and municipalities | Short-term Investments |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale Debt Securities | 11,200 | 4,600
U.S. Treasury securities, obligations of U.S. Government agencies and municipalities | Bank Time Deposits |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale Debt Securities | 7,000 | 7,700
Corporate Debt Securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale Debt Securities | $ 6,636 | $ 5,384

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