OTHER COMPREHENSIVE INCOME (LOSS) - Reclassifications Out of AOCI Into Net Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Reclassification out of accumulated comprehensive income into net income available to common shareholders [Line Items]
Impairment losses	$ (41)	$ (6,491)	$ (9,124)	$ (7,074)
Income (loss) before income taxes and interest in income (loss) of equity method investments	209,782	(2,187)	584,113	164,248
Income tax (expense) benefit	(24,624)	363	(68,078)	5,304
Net income (loss)	188,098	(9,384)	518,870	174,592
Unrealized gains (losses) on available for sale investments | Reclassification out of Accumulated Other Comprehensive Income
Reclassification out of accumulated comprehensive income into net income available to common shareholders [Line Items]
Other realized gains (losses)	(26,200)	(101,860)	(101,394)	(248,007)
Impairment losses	(41)	(6,491)	(9,124)	(7,074)
Income (loss) before income taxes and interest in income (loss) of equity method investments	(26,241)	(108,351)	(110,518)	(255,081)
Income tax (expense) benefit	3,223	9,572	10,130	25,308
Net income (loss)	$ (23,018)	$ (98,779)	$ (100,388)	$ (229,773)