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INVESTMENTS - Contractual Maturities (Details) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2022 | Dec. 31, 2021
Amortized cost |  |
Due in one year or less | $ 642,398 | $ 503,716
Due after one year through five years | 4,820,949 | 4,878,151
Due after five years through ten years | 2,266,898 | 2,478,542
Due after ten years | 238,044 | 277,756
Total fixed maturities with a single maturity date | 7,968,289 | 8,138,165
Amortized cost, Total | 11,865,935 | 12,241,782
Fair value |  |
Due in one year or less | 625,398 | 505,602
Due after one year through five years | 4,445,708 | 4,908,640
Due after five years through ten years | 1,911,316 | 2,488,478
Due after ten years | 202,847 | 279,056
Total fixed maturities with a single maturity date | 7,185,269 | 8,181,776
Fair value | $ 10,784,353 | $ 12,313,200
% of Total fair value |  |
Due in one year or less (as a percent) | 5.90% | 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) | 17.70% | 20.20%
Due after ten years (as a percent) | 1.90% | 2.30%
Fixed maturities with a single maturity date (as a percent) | 66.70% | 66.50%
Total (as a percent) | 100.00% | 100.00%
Agency RMBS |  |
Amortized cost |  |
Fixed maturities without a single maturity date | $ 1,128,676 | $ 1,065,973
Amortized cost, Total | 1,128,676 | 1,065,973
Fair value |  |
Fixed maturities without a single maturity date | 1,016,008 | 1,074,589
Fair value | $ 1,016,008 | $ 1,074,589
% of Total fair value |  |
Fixed maturities without a single maturity date (as a percent) | 9.40% | 8.70%
CMBS |  |
Amortized cost |  |
Fixed maturities without a single maturity date | $ 1,088,174 | $ 1,223,051
Amortized cost, Total | 1,088,174 | 1,223,051
Fair value |  |
Fixed maturities without a single maturity date | 1,005,008 | 1,248,191
Fair value | $ 1,005,008 | $ 1,248,191
% of Total fair value |  |
Fixed maturities without a single maturity date (as a percent) | 9.30% | 10.10%
Non-agency RMBS |  |
Amortized cost |  |
Fixed maturities without a single maturity date | $ 160,143 | $ 185,854
Amortized cost, Total | 160,143 | 185,854
Fair value |  |
Fixed maturities without a single maturity date | 141,356 | 186,164
Fair value | $ 141,356 | $ 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 | $ 1,520,653 | $ 1,628,739
Amortized cost, Total | 1,520,653 | 1,628,739
Fair value |  |
Fixed maturities without a single maturity date | 1,436,712 | 1,622,480
Fair value | $ 1,436,712 | $ 1,622,480
% of Total fair value |  |
Fixed maturities without a single maturity date (as a percent) | 13.30% | 13.20%
Held-to-maturity securities without a single maturity date | $ 613,000 | $ 408,000
Corporate debt |  |
Amortized cost |  |
Amortized cost, Total | 4,688,443 | 4,446,585
Fair value |  |
Fair value | 4,140,112 | 4,495,312
% of Total fair value |  |
Held-to-maturity securities with maturity after three years through 10 years | 73,000 | 34,000
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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