v3.25.4
ACQUISITION OF VALIDUS - Schedule of Identifiable Intangible Assets (Details) - Validus - USD ($)
$ in Thousands
 26 Months Ended
Nov. 01, 2023
Dec. 31, 2025
Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Intangible Assets, Other Than Goodwill [Roll Forward]    
Accumulated amortization (from November 1, 2023 through December 31, 2025), net of foreign exchange   $ 128,789
Impairment loss on insurance licenses   13,767
Net identifiable intangible assets related to the acquisition of Validus at December 31, 2025 $ 460,884 318,328
Insurance licenses    
Business Combination [Line Items]    
Intangible assets acquired 13,884
Agent relationships - top four    
Business Combination [Line Items]    
Prepaid reinsurance premiums $ 195,000  
Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Intangible Assets, Other Than Goodwill [Roll Forward]    
Economic Useful Life 15 years  
Agent relationships - other    
Business Combination [Line Items]    
Prepaid reinsurance premiums $ 9,000  
Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Intangible Assets, Other Than Goodwill [Roll Forward]    
Economic Useful Life 5 years  
Managing General Agent (“MGA”) relationships    
Business Combination [Line Items]    
Prepaid reinsurance premiums $ 3,000  
Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Intangible Assets, Other Than Goodwill [Roll Forward]    
Economic Useful Life 15 years  
Trade name    
Business Combination [Line Items]    
Prepaid reinsurance premiums $ 5,000  
Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Intangible Assets, Other Than Goodwill [Roll Forward]    
Economic Useful Life 6 months  
Renewal rights    
Business Combination [Line Items]    
Prepaid reinsurance premiums $ 215,000  
Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Intangible Assets, Other Than Goodwill [Roll Forward]    
Economic Useful Life 15 years  
Asset management contracts    
Business Combination [Line Items]    
Prepaid reinsurance premiums $ 20,000  
Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Intangible Assets, Other Than Goodwill [Roll Forward]    
Economic Useful Life 4 years