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INVESTMENTS - Net Investment Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Net Investment Income [Line Items]
Gross investment income	$ 98,478	$ 120,457
Investment expenses	(7,123)	(6,292)
Net investment income	91,355	114,165
Fixed maturities
Net Investment Income [Line Items]
Gross investment income	64,809	69,470
Other investments
Net Investment Income [Line Items]
Gross investment income	26,050	41,833
Equity securities
Net Investment Income [Line Items]
Gross investment income	2,172	2,498
Mortgage loans
Net Investment Income [Line Items]
Gross investment income	4,163	4,187
Cash and cash equivalents
Net Investment Income [Line Items]
Gross investment income	1,118	2,336
Short-term investments
Net Investment Income [Line Items]
Gross investment income	$ 166	$ 133

X

- Definition

The net gain or loss (both realized and unrealized) related to investments in certain entities that calculate net asset value per share and the amount after accretion (amortization) of discount (premium), of interest income and dividend income on nonoperating securities.

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- Definition

The net gain or loss (both realized and unrealized) related to investments in certain entities that calculate net asset value per share and the amount after accretion (amortization) of discount (premium) of interest income and dividend income on nonoperating securities, net of investment expense.

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- Definition

Amount of expenses related to the generation of investment income.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.9)
-URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04.2)
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