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INVESTMENTS - Contractual Maturities (Details) - USD ($) $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 30, 2022 | Dec. 31, 2021
Amortized cost |  |
Due in one year or less | $ 591,635 | $ 503,716
Due after one year through five years | 4,913,936 | 4,878,151
Due after five years through ten years | 2,405,936 | 2,478,542
Due after ten years | 261,956 | 277,756
Total fixed maturities with a single maturity date | 8,173,463 | 8,138,165
Amortized cost, Total | 12,086,129 | 12,241,782
Fair value |  |
Due in one year or less | 584,080 | 505,602
Due after one year through five years | 4,654,847 | 4,908,640
Due after five years through ten years | 2,125,717 | 2,488,478
Due after ten years | 233,620 | 279,056
Total fixed maturities with a single maturity date | 7,598,264 | 8,181,776
Fair value | $ 11,304,682 | $ 12,313,200
% of Total fair value |  |
Due in one year or less (as a percent) | 5.10% | 4.10%
Due after one year through five years (as a percent) | 41.20% | 39.90%
Due after five years through ten years (as a percent) | 18.80% | 20.20%
Due after ten years (as a percent) | 2.10% | 2.30%
Fixed maturities with a single maturity date (as a percent) | 67.20% | 66.50%
Total (as a percent) | 100.00% | 100.00%
Agency RMBS |  |
Amortized cost |  |
Fixed maturities without a single maturity date | $ 1,082,381 | $ 1,065,973
Amortized cost, Total | 1,082,381 | 1,065,973
Fair value |  |
Fixed maturities without a single maturity date | 1,019,124 | 1,074,589
Fair value | $ 1,019,124 | $ 1,074,589
% of Total fair value |  |
Fixed maturities without a single maturity date (as a percent) | 9.00% | 8.70%
CMBS |  |
Amortized cost |  |
Fixed maturities without a single maturity date | $ 1,143,767 | $ 1,223,051
Amortized cost, Total | 1,143,767 | 1,223,051
Fair value |  |
Fixed maturities without a single maturity date | 1,083,040 | 1,248,191
Fair value | $ 1,083,040 | $ 1,248,191
% of Total fair value |  |
Fixed maturities without a single maturity date (as a percent) | 9.60% | 10.10%
Non-agency RMBS |  |
Amortized cost |  |
Fixed maturities without a single maturity date | $ 162,101 | $ 185,854
Amortized cost, Total | 162,101 | 185,854
Fair value |  |
Fixed maturities without a single maturity date | 148,104 | 186,164
Fair value | $ 148,104 | $ 186,164
% of Total fair value |  |
Fixed maturities without a single maturity date (as a percent) | 1.30% | 1.50%
ABS |  |
Amortized cost |  |
Fixed maturities without a single maturity date | $ 1,524,417 | $ 1,628,739
Amortized cost, Total | 1,524,417 | 1,628,739
Fair value |  |
Fixed maturities without a single maturity date | 1,456,150 | 1,622,480
Fair value | $ 1,456,150 | $ 1,622,480
% of Total fair value |  |
Fixed maturities without a single maturity date (as a percent) | 12.90% | 13.20%
Held-to-maturity securities without a single maturity date | $ 574,000 | $ 408,000
Corporate debt |  |
Amortized cost |  |
Amortized cost, Total | 4,764,585 | 4,446,585
Fair value |  |
Fair value | 4,341,057 | 4,495,312
% of Total fair value |  |
Held-to-maturity securities with maturity after three years through 10 years | $ 63,000 | 34,000
Debt securities, held-to-maturity, maturity period | 10 years |
Held-to-maturity securities with maturity after ten years | $ 4,000 | $ 4,000
Corporate debt | Minimum |  |
% of Total fair value |  |
Debt securities, held-to-maturity, maturity period | 3 years |
Corporate debt | Maximum |  |
% of Total fair value |  |
Debt securities, held-to-maturity, maturity period | 10 years |

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