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INVESTMENTS - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Mar. 01, 2022
Dec. 31, 2021
Dec. 31, 2022
Schedule Of Available For Sale Securities [Line Items]      
Fair value of securities transferred from available for sale to fixed maturities, held to maturity $ 405,000 $ 405,000  
Allowance for expected credit losses   0 $ 0
Fixed maturities, held to maturity, at amortized cost   446,016 $ 698,351
Limited Partner      
Schedule Of Available For Sale Securities [Line Items]      
Percentage of investment composition (as a percent)     71.00%
ABS      
Schedule Of Available For Sale Securities [Line Items]      
Held to maturity securities with no single maturity date   408,000 $ 613,000
Allowance for expected credit losses   0 0
Fixed maturities, held to maturity, at amortized cost   408,316 613,151
Corporate debt      
Schedule Of Available For Sale Securities [Line Items]      
Allowance for expected credit losses   0 0
Held To Maturity Securities Debt Maturities After Three Through Ten Years Net Carrying Amount   34,000 81,000
Held to maturity securities due after ten years   4,000 4,000
Fixed maturities, held to maturity, at amortized cost   $ 37,700 $ 85,200