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OTHER COMPREHENSIVE INCOME (LOSS) - Tax Effects of Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Before tax amount
Unrealized gains (losses) arising during the period, net of reclassification adjustment	$ (51,963)	$ 212,922
Foreign currency translation adjustment	(8,951)	(535)
Total other comprehensive income (loss), before tax	(60,914)	212,387
Income tax (expense) benefit
Unrealized gains (losses) arising during the period, net of reclassification adjustment	14,901	(23,983)
Foreign currency translation adjustment	0	0
Income tax (expense) benefit	14,901	(23,983)
Net of tax amount
Unrealized gains (losses) arising during the period, net of reclassification adjustment	(37,062)	188,939
Foreign currency translation adjustment	(8,951)	(535)
Total other comprehensive income (loss), net of tax	(46,013)	188,404
Available for sale investments
Before tax amount
Adjustment for reclassification of net realized (gains) losses and impairment losses recognized in net income (loss)	24,879	44,121
Income tax (expense) benefit
Adjustment for reclassification of net realized (gains) losses and impairment losses recognized in net income (loss)	(1,464)	(3,371)
Net of tax amount
Adjustment for reclassification of net realized (gains) losses and impairment losses recognized in net income (loss)	23,415	40,750
Unrealized gains (losses) arising during the period, net of reclassification adjustment	(37,062)	188,939
Available for sale investments | Unrealized gains (losses) arising during the period for which an allowance for expected credit losses has been recognized
Before tax amount
Unrealized gains (losses) arising during the period	(76,408)	153,851
Income tax (expense) benefit
Unrealized gains (losses) arising during the period	16,349	(19,284)
Net of tax amount
Unrealized gains (losses) arising during the period	(60,059)	134,567
Available for sale investments | Unrealized gains (losses) arising during the period for which an allowance for expected credit losses has not been recognized
Before tax amount
Unrealized gains (losses) arising during the period	(434)	14,950
Income tax (expense) benefit
Unrealized gains (losses) arising during the period	16	(1,328)
Net of tax amount
Unrealized gains (losses) arising during the period	$ (418)	$ 13,622

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