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Investments - Other Than Temporarily Impaired and Credit Ratings (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Schedule of Fixed Maturities Table [Line Items]    
Amortized cost $ 327,339 $ 330,439
Fair value $ 313,363 $ 314,527
% of Total fair value 100.00% 100.00%
AAA    
Schedule of Fixed Maturities Table [Line Items]    
Amortized cost $ 114,065 $ 112,775
Fair value $ 109,631 $ 108,136
% of Total fair value 35.00% 34.40%
AA+, AA, AA-    
Schedule of Fixed Maturities Table [Line Items]    
Amortized cost $ 26,119 $ 23,974
Fair value $ 24,895 $ 22,640
% of Total fair value 7.90% 7.20%
A+, A, A-    
Schedule of Fixed Maturities Table [Line Items]    
Amortized cost $ 36,790 $ 38,549
Fair value $ 34,565 $ 35,996
% of Total fair value 11.00% 11.40%
BBB+, BBB, BBB-    
Schedule of Fixed Maturities Table [Line Items]    
Amortized cost $ 56,015 $ 55,374
Fair value $ 54,047 $ 53,094
% of Total fair value 17.30% 16.90%
BB+ or lower    
Schedule of Fixed Maturities Table [Line Items]    
Amortized cost $ 5,420 $ 5,353
Fair value $ 5,121 $ 4,764
% of Total fair value 1.60% 1.50%
U.S. treasury bonds    
Schedule of Fixed Maturities Table [Line Items]    
Amortized cost $ 51,030 $ 55,647
Fair value $ 50,943 $ 55,532
% of Total fair value 16.30% 17.70%
U.S. agency bonds    
Schedule of Fixed Maturities Table [Line Items]    
Amortized cost $ 37,900 $ 38,767
Fair value $ 34,161 $ 34,365
% of Total fair value 10.90% 10.90%