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INVESTMENTS - Net Investment Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Net Investment Income [Line Items]
Gross investment income	$ 197,988	$ 144,209	$ 372,073	$ 285,471
Investment expenses	(7,013)	(7,380)	(13,715)	(14,870)
Net investment income	190,975	136,829	358,358	270,601
Fixed maturities
Net Investment Income [Line Items]
Gross investment income	154,023	124,390	293,419	242,652
Other investments
Net Investment Income [Line Items]
Gross investment income	14,301	(5,341)	19,974	(4,855)
Equity securities
Net Investment Income [Line Items]
Gross investment income	3,057	2,990	5,819	5,445
Mortgage loans
Net Investment Income [Line Items]
Gross investment income	9,108	8,880	18,237	17,266
Cash and cash equivalents
Net Investment Income [Line Items]
Gross investment income	13,733	11,161	27,395	21,174
Short-term investments
Net Investment Income [Line Items]
Gross investment income	$ 3,766	$ 2,129	$ 7,229	$ 3,789

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.

+ References

No definition available.

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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

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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