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INVESTMENTS - Net Investment Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Net Investment Income [Line Items]
Gross investment income	$ 98,606	$ 110,796	$ 197,084	$ 231,253
Investment expenses	(6,392)	(6,124)	(13,515)	(12,417)
Net investment income	92,214	104,672	183,569	218,836
Fixed maturities
Net Investment Income [Line Items]
Gross investment income	72,607	61,244	137,416	130,714
Other investments
Net Investment Income [Line Items]
Gross investment income	14,327	41,414	40,377	83,248
Equity securities
Net Investment Income [Line Items]
Gross investment income	2,688	3,100	4,860	5,598
Mortgage loans
Net Investment Income [Line Items]
Gross investment income	4,903	4,355	9,067	8,541
Cash and cash equivalents
Net Investment Income [Line Items]
Gross investment income	3,679	617	4,797	2,953
Short-term investments
Net Investment Income [Line Items]
Gross investment income	$ 402	$ 66	$ 567	$ 199

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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