INVESTMENTS - Schedule of Components of Net Investment Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Investment income before investment expenses	$ 334,787	$ 163,295	$ 891,965	$ 364,967
Investment expenses	(5,679)	(5,502)	(15,817)	(16,272)
Net investment income	329,108	157,793	876,148	348,695
Fixed maturity investments trading
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Investment income before investment expenses	188,781	107,182	514,020	246,146
Short term investments
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Investment income before investment expenses	66,722	11,601	149,903	17,134
Equity investments
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Investment income before investment expenses	510	6,120	6,675	13,390
Catastrophe bonds
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Investment income before investment expenses	54,583	25,748	142,936	63,343
Other
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Investment income before investment expenses	20,031	11,258	65,422	23,704
Cash and cash equivalents
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Investment income before investment expenses	$ 4,160	$ 1,386	$ 13,009	$ 1,250