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INVESTMENTS - Contractual Maturities (Details) - USD ($) $ in Thousands | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Amortized cost |  |
Due in one year or less | $ 799,006 | $ 895,177
Due after one year through five years | 5,222,543 | 5,637,336
Due after five years through ten years | 1,835,434 | 1,895,116
Due after ten years | 177,807 | 214,595
Total fixed maturities with a single maturity date | 8,034,790 | 8,642,224
Amortized cost, total | 11,997,330 | 12,419,905
Fair value |  |
Due in one year or less | 793,243 | 885,866
Due after one year through five years | 5,199,338 | 5,567,905
Due after five years through ten years | 1,803,925 | 1,826,564
Due after ten years | 171,699 | 205,597
Total fixed maturities with a single maturity date | 7,968,205 | 8,485,932
Fair value, total | $ 11,865,480 | $ 12,152,753
% of Total fair value |  |
Due in one year or less (as a percent) | 6.80% | 7.40%
Due after one year through five years (as a percent) | 43.80% | 45.80%
Due after five years through ten years (as a percent) | 15.20% | 15.00%
Due after ten years (as a percent) | 1.40% | 1.70%
Fixed maturities with a single maturity date (as a percent) | 67.20% | 69.90%
Total (as a percent) | 100.00% | 100.00%
Agency RMBS |  |
Amortized cost |  |
Fixed maturities without a single maturity date | $ 1,591,388 | $ 1,245,681
Amortized cost, total | 1,591,388 | 1,245,681
Fair value |  |
Fixed maturities without a single maturity date | 1,557,554 | 1,184,845
Fair value, total | $ 1,557,554 | $ 1,184,845
% of Total fair value |  |
Fixed maturities without a single maturity date (as a percent) | 13.10% | 9.70%
CMBS |  |
Amortized cost |  |
Fixed maturities without a single maturity date | $ 879,004 | $ 852,534
Amortized cost, total | 879,004 | 852,534
Fair value |  |
Fixed maturities without a single maturity date | 856,108 | 819,608
Fair value, total | $ 856,108 | $ 819,608
% of Total fair value |  |
Fixed maturities without a single maturity date (as a percent) | 7.20% | 6.70%
Non-agency RMBS |  |
Amortized cost |  |
Fixed maturities without a single maturity date | $ 195,220 | $ 132,116
Amortized cost, total | 195,220 | 132,116
Fair value |  |
Fixed maturities without a single maturity date | 189,739 | 122,536
Fair value, total | $ 189,739 | $ 122,536
% of Total fair value |  |
Fixed maturities without a single maturity date (as a percent) | 1.60% | 1.00%
ABS |  |
Amortized cost |  |
Fixed maturities without a single maturity date | $ 1,296,928 | $ 1,547,350
Amortized cost, total | 1,296,928 | 1,547,350
Fair value |  |
Fixed maturities without a single maturity date | 1,293,874 | 1,539,832
Fair value, total | $ 1,293,874 | $ 1,539,832
% of Total fair value |  |
Fixed maturities without a single maturity date (as a percent) | 10.90% | 12.70%

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