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INVESTMENTS - Net Investment Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Net Investment Income [Line Items]
Gross investment income	$ 174,085	$ 141,261
Investment expenses	(6,702)	(7,490)
Net investment income	167,383	133,771
Fixed maturities
Net Investment Income [Line Items]
Gross investment income	139,396	118,262
Other investments
Net Investment Income [Line Items]
Gross investment income	5,673	486
Equity securities
Net Investment Income [Line Items]
Gross investment income	2,762	2,455
Mortgage loans
Net Investment Income [Line Items]
Gross investment income	9,130	8,386
Cash and cash equivalents
Net Investment Income [Line Items]
Gross investment income	13,661	10,012
Short-term investments
Net Investment Income [Line Items]
Gross investment income	$ 3,463	$ 1,660

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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Amount of expenses related to the generation of investment income.

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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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