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DERIVATIVE INSTRUMENTS - Schedule of Location and Amount of the Gain (Loss) Recognized (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2025 | Mar. 31, 2024
Derivative Instruments, Gain (Loss) [Line Items] |  |
Amount of gain (loss) recognized on derivatives | $ 149,455 | $ (75,399)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Net foreign exchange gains (losses), Net realized and unrealized gains (losses) on investments | Net foreign exchange gains (losses), Net realized and unrealized gains (losses) on investments
Derivative instruments not designated as hedges |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Amount of gain (loss) recognized on derivatives | $ 149,820 | $ (78,253)
Derivative instruments not designated as hedges | Interest rate futures |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Amount of gain (loss) recognized on derivatives | 66,203 | (55,280)
Derivative instruments not designated as hedges | Foreign currency forward contracts |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Amount of gain (loss) recognized on derivatives | 9,261 | (4,481)
Derivative instruments not designated as hedges | Foreign currency forward contracts |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Amount of gain (loss) recognized on derivatives | (1,087) | (15,966)
Derivative instruments not designated as hedges | Credit default swaps |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Amount of gain (loss) recognized on derivatives | 10,399 | (21,304)
Derivative instruments not designated as hedges | Equity futures |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Amount of gain (loss) recognized on derivatives | (52,547) | 0
Derivative instruments not designated as hedges | Commodity options |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Amount of gain (loss) recognized on derivatives | (483) | (370)
Derivative instruments not designated as hedges | Commodity futures |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Amount of gain (loss) recognized on derivatives | 118,074 | 19,148
Derivative instruments designated as hedges |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Amount of gain (loss) recognized on derivatives | (365) | 2,854
Derivative instruments designated as hedges | Foreign currency forward contracts |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Accumulated other comprehensive income (loss) | $ (365) | $ 2,854

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