v3.26.1
INVESTMENTS - Contractual Maturities (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Amortized cost    
Due in one year or less $ 316,052 $ 364,414
Due after one year through five years 5,802,284 5,665,467
Due after five years through ten years 2,478,202 2,212,109
Due after ten years 287,302 185,304
Total fixed maturities with a single maturity date 8,883,840 8,427,294
Amortized cost, total 13,916,563 12,937,728
Fair value    
Due in one year or less 316,161 364,273
Due after one year through five years 5,776,470 5,721,423
Due after five years through ten years 2,464,630 2,231,417
Due after ten years 284,458 185,860
Total fixed maturities with a single maturity date 8,841,719 8,502,973
Fair value, total $ 13,828,314 $ 13,018,027
% of Total fair value    
Due in one year or less (as a percent) 2.30% 2.80%
Due after one year through five years (as a percent) 41.80% 44.00%
Due after five years through ten years (as a percent) 17.80% 17.10%
Due after ten years (as a percent) 2.10% 1.40%
Fixed maturities with a single maturity date (as a percent) 64.00% 65.30%
Total (as a percent) 100.00% 100.00%
Agency RMBS    
Amortized cost    
Fixed maturities without a single maturity date $ 2,445,926 $ 2,026,043
Amortized cost, total 2,445,926 2,026,043
Fair value    
Fixed maturities without a single maturity date 2,422,949 2,035,352
Fair value, total $ 2,422,949 $ 2,035,352
% of Total fair value    
Fixed maturities without a single maturity date (as a percent) 17.50% 15.60%
CMBS    
Amortized cost    
Fixed maturities without a single maturity date $ 804,486 $ 811,056
Amortized cost, total 804,486 811,056
Fair value    
Fixed maturities without a single maturity date 788,348 801,511
Fair value, total $ 788,348 $ 801,511
% of Total fair value    
Fixed maturities without a single maturity date (as a percent) 5.70% 6.20%
Non-agency RMBS    
Amortized cost    
Fixed maturities without a single maturity date $ 212,897 $ 193,372
Amortized cost, total 212,897 193,372
Fair value    
Fixed maturities without a single maturity date 208,039 190,124
Fair value, total $ 208,039 $ 190,124
% of Total fair value    
Fixed maturities without a single maturity date (as a percent) 1.50% 1.50%
ABS    
Amortized cost    
Fixed maturities without a single maturity date $ 1,569,414 $ 1,479,963
Amortized cost, total 1,569,414 1,479,963
Fair value    
Fixed maturities without a single maturity date 1,567,259 1,488,067
Fair value, total $ 1,567,259 $ 1,488,067
% of Total fair value    
Fixed maturities without a single maturity date (as a percent) 11.30% 11.40%