INVESTMENTS - Schedule of Net Realized and Unrealized Gains (Losses) on Fixed Maturity Investments Trading and Equity Investments (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Fixed maturity investments trading
Fixed maturity investments trading
Net realized gains (losses)	$ 20,764	$ (63,929)	$ (393,041)
Net unrealized gains (losses)	399,093	(182,494)	685,095
Net realized and unrealized gains (losses)	419,857	(246,423)	292,054
Equity investments
Equity investments
Net realized gains (losses)	598	355	(27,492)
Net unrealized gains (losses)	48,776	10,621	73,243
Net realized and unrealized gains (losses)	$ 49,374	$ 10,976	$ 45,751

Amount of unrealized and realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in net income (trading).

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Amount of realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in net income (trading).

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Amount of unrealized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in net income (trading).

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Amount of unrealized and realized gain (loss) on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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Amount of realized gain (loss) from sale of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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