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OTHER COMPREHENSIVE INCOME (LOSS) - Tax Effects of Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Before tax amount
Unrealized gains (losses) arising during the period, net of reclassification adjustment	$ (296,487)	$ (81,389)	$ (1,142,423)	$ (298,474)
Foreign currency translation adjustment	(12,751)	(3,807)	(16,169)	924
Total comprehensive income (loss), before tax	(309,238)	(85,196)	(1,158,592)	(297,550)
Income tax (expense) benefit
Unrealized gains (losses) arising during the period, net of reclassification adjustment	(9,298)	9,001	59,406	33,277
Foreign currency translation adjustment	0	0	0	0
Total comprehensive income (loss), net of tax	(9,298)	9,001	59,406	33,277
Net of tax amount
Unrealized gains (losses) arising during the period, net of reclassification adjustment	(305,785)	(72,388)	(1,083,017)	(265,197)
Foreign currency translation adjustment	(12,751)	(3,807)	(16,169)	924
Total other comprehensive income (loss), net of tax	(318,536)	(76,195)	(1,099,186)	(264,273)
Available for sale investments
Before tax amount
Adjustment for reclassification of net realized (gains) losses and impairment losses recognized in net income (loss)	108,351	(16,438)	255,081	(94,018)
Income tax (expense) benefit
Adjustment for reclassification of net realized (gains) losses and impairment losses recognized in net income (loss)	(9,572)	1,858	(25,308)	7,837
Net of tax amount
Adjustment for reclassification of net realized (gains) losses and impairment losses recognized in net income (loss)	98,779	(14,580)	229,773	(86,181)
Unrealized gains (losses) arising during the period, net of reclassification adjustment	(305,785)	(72,388)	(1,083,017)	(265,197)
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	(393,848)	(65,321)	(1,340,927)	(204,587)
Income tax (expense) benefit
Unrealized gains (losses) arising during the period	(32)	7,143	81,445	25,440
Net of tax amount
Unrealized gains (losses) arising during the period	(393,880)	(58,178)	(1,259,482)	(179,147)
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	(10,990)	370	(56,577)	131
Income tax (expense) benefit
Unrealized gains (losses) arising during the period	306	0	3,269	0
Net of tax amount
Unrealized gains (losses) arising during the period	$ (10,684)	$ 370	$ (53,308)	$ 131

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-URI https://asc.fasb.org/extlink&oid=124431353&loc=SL124442407-227067

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 17A
-URI https://asc.fasb.org/extlink&oid=126968391&loc=SL34724391-108580

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