XML 120 R94.htm IDEA: XBRL DOCUMENT v3.25.0.1
RESERVE FOR LOSSES AND LOSS EXPENSES - Summary of Prior Year Reserve Development by Segment and Reserving Class (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Liability for Future Policy Benefit, by Product Segment [Line Items]      
Net favorable prior year reserve development $ 24,323 $ (411,882) $ 25,533
Insurance      
Liability for Future Policy Benefit, by Product Segment [Line Items]      
Net favorable prior year reserve development 16,209 (176,353) 16,350
Insurance | Property      
Liability for Future Policy Benefit, by Product Segment [Line Items]      
Net favorable prior year reserve development 17,718 16,195 52,512
Insurance | Accident and health      
Liability for Future Policy Benefit, by Product Segment [Line Items]      
Net favorable prior year reserve development 4,191 (10,236) (12,856)
Insurance | Marine and aviation      
Liability for Future Policy Benefit, by Product Segment [Line Items]      
Net favorable prior year reserve development (10,656) 26,977 27,927
Insurance | Cyber      
Liability for Future Policy Benefit, by Product Segment [Line Items]      
Net favorable prior year reserve development 0 35,579 8,416
Insurance | Professional lines      
Liability for Future Policy Benefit, by Product Segment [Line Items]      
Net favorable prior year reserve development 0 (41,243) (29,093)
Insurance | Credit and political risk      
Liability for Future Policy Benefit, by Product Segment [Line Items]      
Net favorable prior year reserve development 4,956 31,691 24,361
Insurance | Liability      
Liability for Future Policy Benefit, by Product Segment [Line Items]      
Net favorable prior year reserve development 0 (235,316) (54,917)
Reinsurance      
Liability for Future Policy Benefit, by Product Segment [Line Items]      
Net favorable prior year reserve development 8,114 (235,529) 9,183
Reinsurance | Accident and health      
Liability for Future Policy Benefit, by Product Segment [Line Items]      
Net favorable prior year reserve development 0 29,947 14,199
Reinsurance | Marine and aviation      
Liability for Future Policy Benefit, by Product Segment [Line Items]      
Net favorable prior year reserve development 4,111 12,595 2,597
Reinsurance | Professional lines      
Liability for Future Policy Benefit, by Product Segment [Line Items]      
Net favorable prior year reserve development 0 (92,181) (54,820)
Reinsurance | Liability      
Liability for Future Policy Benefit, by Product Segment [Line Items]      
Net favorable prior year reserve development 0 (262,114) (58,148)
Reinsurance | Agriculture      
Liability for Future Policy Benefit, by Product Segment [Line Items]      
Net favorable prior year reserve development 0 10,781 11,703
Reinsurance | Credit and surety      
Liability for Future Policy Benefit, by Product Segment [Line Items]      
Net favorable prior year reserve development 4,003 8,306 43,567
Reinsurance | Motor      
Liability for Future Policy Benefit, by Product Segment [Line Items]      
Net favorable prior year reserve development 0 (9,653) 18,161
Reinsurance | Run-off lines      
Liability for Future Policy Benefit, by Product Segment [Line Items]      
Net favorable prior year reserve development 0 66,790 31,924
Reinsurance | Run-off lines | Property      
Liability for Future Policy Benefit, by Product Segment [Line Items]      
Net favorable prior year reserve development 0 15,225 42,523
Reinsurance | Run-off lines | Catastrophe      
Liability for Future Policy Benefit, by Product Segment [Line Items]      
Net favorable prior year reserve development 0 46,297 (504)
Reinsurance | Run-off lines | Engineering      
Liability for Future Policy Benefit, by Product Segment [Line Items]      
Net favorable prior year reserve development $ 0 $ 5,268 $ (10,095)