RESERVE FOR LOSSES AND LOSS EXPENSES - Summary of Prior Year Development (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Liability for Claims and Claims Adjustment Expense [Line Items]
Prior year favorable (adverse) adjustments	$ 25,533	$ 32,410	$ 15,909
Insurance
Liability for Claims and Claims Adjustment Expense [Line Items]
Prior year favorable (adverse) adjustments	16,350	18,360	8,937
Reinsurance
Liability for Claims and Claims Adjustment Expense [Line Items]
Prior year favorable (adverse) adjustments	$ 9,183	$ 14,049	$ 6,972