RELATED PARTY TRANSACTIONS (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Related Party Transaction [Line Items]
Payments to acquire equity method investments	$ 10,002	$ 0
Advances to affiliate during the period	139,585	36,235
Other liabilities	365,429		$ 464,439
Monarch Point Re \| Loan With Monarch Point Re \| Related Party
Related Party Transaction [Line Items]
Advances to affiliate during the period	164,000		297,000
Non-cash repayment of advance	95,000	$ 72,000
Loan balance receivable	294,000		225,000
Commitment to advance amounts to reinsurer	$ 89,000		16,000
Stated interest rate (as a percent)	5.30%
Other liabilities	$ 1,000		$ 9,000
Monarch Point Re \| Loan With Monarch Point Re \| Related Party \| Minimum
Related Party Transaction [Line Items]
Stated interest rate (as a percent)		5.70%
Monarch Point Re \| Loan With Monarch Point Re \| Related Party \| Maximum
Related Party Transaction [Line Items]
Stated interest rate (as a percent)		5.90%
Monarch Point Re (ISA 2024) Ltd., (Monarch Point Re (ISAC) Ltd., Monarch Point Re (ISA 2023) Ltd. and Monarch Point Re (ISA 2024) Ltd
Related Party Transaction [Line Items]
Payments to acquire equity method investments	$ 10,000

Long-Term advances receivable from a party that is affiliated with the reporting entity by means of direct or indirect ownership. This does not include advances to clients.

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The increase (decrease) during the reporting period in receivables to be collected from an entity that is controlling, under the control of, or within the same control group as the reporting entity by means of direct or indirect ownership.

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Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions.

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The cash outflow from advancing money to an affiliate (an entity that is related but not strictly controlled by the entity).

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The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

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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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