INVESTMENTS - Summary of Net Investment Gains (Losses) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Gross realized investment gains
Fixed maturities and short-term investments	$ 16,671	$ 137,729	$ 186,726
Equity securities	7,687	5,413	25,648
Gross realized investment gains	24,358	143,142	212,374
Gross realized investment losses
Fixed maturities and short-term investments	(328,493)	(42,613)	(94,607)
Equity securities	(406)	(696)	(5,840)
Gross realized investment losses	(328,899)	(43,309)	(100,447)
Allowance for expected credit losses	(11,421)	11	(323)
Impairment losses	(12,568)	(22)	(1,486)
Unrealized and realized gains (loss) recognized in earnings for derivatives not designated as hedges	7,656	4,346	(2,434)
Net unrealized gains (losses) on equity securities	(135,915)	30,111	21,449
Total net investment gains (losses)	$ (456,789)	$ 134,279	$ 129,133

Amount of realized gain on investment in debt and equity securities.

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Debt and Equity Securities, Realized Gain [Abstract]

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Amount of realized loss on investment in debt and equity securities.

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Debt and Equity Securities, Realized Loss [Abstract]

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This item represents the net realized gains and losses on available for sale debt securities, the net realized and unrealized gains and losses on equity securities with FV recorded in net income, together with the change in fair value of investment derivatives, and expected and realized credit losses.

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Amount of writeoff of allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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-Publisher FASB
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Amount, excluding accrued interest, of increase (decrease) in allowance for credit loss of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of realized gain on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of realized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments.

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Amount of realized gain 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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Amount of realized 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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Amount of unrealized 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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