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INVESTMENTS - Net Investment Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Net Investment Income [Line Items]
Gross investment income	$ 141,261	$ 98,478
Investment expenses	(7,490)	(7,123)
Net investment income	133,771	91,355
Fixed maturities
Net Investment Income [Line Items]
Gross investment income	118,262	64,809
Other investments
Net Investment Income [Line Items]
Gross investment income	486	26,050
Equity securities
Net Investment Income [Line Items]
Gross investment income	2,455	2,172
Mortgage loans
Net Investment Income [Line Items]
Gross investment income	8,386	4,163
Cash and cash equivalents
Net Investment Income [Line Items]
Gross investment income	10,012	1,118
Short-term investments
Net Investment Income [Line Items]
Gross investment income	$ 1,660	$ 166

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 https://asc.fasb.org/extlink&oid=126953954&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)
-URI https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263

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