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Investments Fair Value Inputs, Assets, Quantitative Information (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Equity Securities without Readily Determinable Fair Value
Fixed maturities, available-for-sale (amortized cost of $672,139 and $926,714, respectively)	$ 663,602	$ 940,011
Limited Partner
Equity Securities without Readily Determinable Fair Value
Unrealized gain	1,401	225
Fair value	17,625	9,593
Unrealized loss	526	164
Debt Securities, Available-for-sale, Amortized Cost	16,750	9,532
Certificates of Deposit
Equity Securities without Readily Determinable Fair Value
Unrealized gain	0	0
Unrealized loss	0	0
Certificates of Deposit, at Carrying Value	300	300
Short-term Investments
Equity Securities without Readily Determinable Fair Value
Unrealized gain	0	0
Unrealized loss	0	1
Fixed maturities, available-for-sale (amortized cost of $672,139 and $926,714, respectively)	81	37,702
Debt Securities, Available-for-sale, Amortized Cost	81	37,703
Other Long-term Investments
Equity Securities without Readily Determinable Fair Value
Unrealized gain	1,401	225
Unrealized loss	526	165
Debt Securities, Available-for-sale, Amortized Cost	17,131	47,535
Other Investments	$ 18,006	$ 47,595

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