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INVESTMENTS - Net Investment Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Net Investment Income [Line Items]
Gross investment income	$ 212,621	$ 161,920	$ 584,694	$ 447,391
Investment expenses	(7,521)	(7,719)	(21,236)	(22,589)
Net investment income	205,100	154,201	563,458	424,802
Fixed maturities
Net Investment Income [Line Items]
Gross investment income	163,002	133,006	456,421	375,659
Other investments
Net Investment Income [Line Items]
Gross investment income	19,594	312	39,569	(4,543)
Equity securities
Net Investment Income [Line Items]
Gross investment income	3,529	3,050	9,348	8,495
Mortgage loans
Net Investment Income [Line Items]
Gross investment income	8,175	8,892	26,412	26,158
Cash and cash equivalents
Net Investment Income [Line Items]
Gross investment income	14,402	14,465	41,796	35,638
Short-term investments
Net Investment Income [Line Items]
Gross investment income	$ 3,919	$ 2,195	$ 11,148	$ 5,984

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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