Schedule I (Details) $ in Thousands	Dec. 31, 2021 USD ($)
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	$ 168,678	[1],[2]
Market Value	220,333	[2]
Amount at which shown in the Balance Sheet	220,333	[2],[3]
Fixed maturity securities
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	75,511	[1]
Market Value	79,791
Amount at which shown in the Balance Sheet	79,791	[3]
Government obligations
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	0	[1]
Market Value	0
Amount at which shown in the Balance Sheet	0	[1],[3]
General obligations of U.S. states, territories and political subdivisions
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	16,467	[1]
Market Value	17,383
Amount at which shown in the Balance Sheet	17,383	[3]
Special revenue issuer obligations of U.S. states, territories and political subdivisions
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	31,695	[1]
Market Value	33,573
Amount at which shown in the Balance Sheet	33,573	[3]
Public utilities
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	10,260	[1]
Market Value	10,839
Amount at which shown in the Balance Sheet	10,839	[3]
Corporate debt securities
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	17,089	[1]
Market Value	17,996
Amount at which shown in the Balance Sheet	17,996	[3]
Equity securities
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	29,478	[1]
Market Value	76,853
Amount at which shown in the Balance Sheet	76,853	[3]
Public utilities
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	286	[1]
Market Value	506
Amount at which shown in the Balance Sheet	506	[3]
Banks, trusts and insurance companies
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	2,785	[1]
Market Value	7,578
Amount at which shown in the Balance Sheet	7,578	[3]
Industrial, miscellaneous and all other
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	23,540	[1]
Market Value	53,581
Amount at which shown in the Balance Sheet	53,581	[3]
Technology
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	2,867	[1]
Market Value	15,188
Amount at which shown in the Balance Sheet	15,188	[3]
Short-term investments
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	45,930	[1]
Market Value	45,930
Amount at which shown in the Balance Sheet	45,930	[3]
Other investments
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	17,759	[2]
Market Value	17,759	[2]
Amount at which shown in the Balance Sheet	17,759	[2],[3]
Total other investments
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	63,689	[1]
Market Value	63,689
Amount at which shown in the Balance Sheet	63,689	[3]
Other Affiliates
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Amount at which shown in the Balance Sheet	$ 2,539

[1] Fixed maturity securities are shown at amortized cost and equity securities are shown at original cost.

[2] The above summary of investments does not include investments in related parties accounted for under the cost and equity methods of accounting in the amount of $2,539.

[3] All fixed maturity securities presented are classified as available-for-sale and shown at estimated fair value. Equity securities are shown at fair value.