Investments - Net Investment Income and Losses (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Net Investment Income [Line Items]
Investment income	$ 609	$ 1,006	$ 1,258	$ 2,047
Investment expenses	(106)	(143)	(223)	(230)
Net investment income	503	863	1,035	1,817
Debt securities
Net Investment Income [Line Items]
Investment income	554	929	1,154	1,796
Equity securities
Net Investment Income [Line Items]
Investment income	$ 55	53	103	108
Cash, cash equivalents and short-term investments
Net Investment Income [Line Items]
Investment income		$ 24	$ 1	$ 143

Amount, before investment expense, of income earned from investments in securities and real estate. Includes, but is not limited to, real estate investment, policy loans, dividends, and interest. Excludes realized gain (loss) on investments.

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-Topic 944
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04.2)
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Amount of expenses related to the generation of investment income.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
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Amount, after investment expense, of income earned from investments in securities and real estate. Includes, but is not limited to, real estate investment, policy loans, dividends, and interest. Excludes realized gain (loss) on investments.

+ References

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-Paragraph 1
-Subparagraph (SX 210.7-04(2))
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