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Investments - Additional Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) Security	Dec. 31, 2018 USD ($) Security	Dec. 31, 2017 USD ($)
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Debt Securities	$ 32,006	$ 22,137
Number of securities in unrealized loss position | Security	10	20
Proceeds from sale of investment in fixed maturity securities	$ 5,800	$ 17,100
Proceeds from Sale of Other Investments	8,500	17,900
Payments to Acquire Investments	17,520	9,284	$ 10,665
Investments on deposit with the state insurance department	4,100
U.S. Treasury securities, obligations of U.S. Government agencies and Municipalities
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Debt Securities	26,622	21,514
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	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	7,700
Corporate Debt Securities
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Debt Securities	$ 5,384	$ 623

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Carrying amount of cash and investment securities on deposit with state regulatory authorities in connection with capital requirements.

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