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Investments - Equity Securities, FV-NI (Details) - USD ($)
$ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Debt and Equity Securities, FV-NI    
Fair value $ 37,552 $ 37,958
Percent of Total 100.00% 100.00%
Mutual Fund    
Debt and Equity Securities, FV-NI    
Fair value $ 33,027 $ 33,064
Percent of Total 88.00% 87.10%
Nonredeemable Preferred Stocks    
Debt and Equity Securities, FV-NI    
Fair value $ 4,525 $ 4,894
Percent of Total 12.00% 12.90%