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INVESTMENTS - Schedule of Contractual Maturities of Fixed Maturity Investments (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Amortized Cost |  |
Due in less than one year | $ 561,262 | $ 587,720
Due after one through five years | 11,305,216 | 11,439,510
Due after five through ten years | 5,921,030 | 5,182,667
Due after ten years | 320,954 | 307,392
Amortized Cost | 21,519,144 | 20,872,450
Fair Value |  |
Due in less than one year | 556,795 | 582,519
Due after one through five years | 11,229,683 | 11,468,263
Due after five through ten years | 5,863,512 | 5,188,716
Due after ten years | 297,899 | 292,473
Fixed maturity investments trading | 21,309,460 | 20,877,108
Mortgage-backed |  |
Amortized Cost |  |
Amortized Cost | 1,985,128 | 1,864,520
Fair Value |  |
Fixed maturity investments trading | 1,933,058 | 1,853,442
Asset-backed |  |
Amortized Cost |  |
Amortized Cost | 1,425,554 | 1,490,641
Fair Value |  |
Fixed maturity investments trading | $ 1,428,513 | $ 1,491,695

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- Definition This item represents debt securities, at cost, net of adjustments including accretion, amortization and collection of cash, if any, which are expected to mature after ten years of the balance sheet date and are categorized as trading securities. + References No definition available. + Details
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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in net income (trading). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481830/320-10-45-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(2)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483467/210-10-45-1 + Details
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