v3.26.1
Basis of Presentation and Significant Accounting Policies (Details)
$ in Millions
3 Months Ended
Mar. 31, 2026
USD ($)
segment
Dec. 31, 2025
USD ($)
Sep. 02, 2025
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]      
Number of reportable segments | segment 4    
Percent of shares outstanding 12.40%    
Subsidiary - HG Global      
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]      
Purchase of surplus notes $ 503.0    
Subsidiary - HG Global | Maximum      
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]      
Percentage of par value of policy reinsured 15.00%    
Outrigger Re      
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]      
Ceded unearned premiums   $ 70.0  
Net distributions $ 138.8    
Ark      
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]      
Basic ownership 72.10% 72.10%  
Ownership percentage, after equity incentives 62.50% 61.90%  
Ownership percentage, fully diluted 53.60%    
Subsidiary - WM Outrigger Re | Preferred Stock      
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]      
Basic ownership 100.00% 100.00%  
Kudu      
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]      
Basic ownership 91.30%    
Ownership percentage of basic units outstanding   91.20%  
Ownership percentage, fully diluted 78.40% 77.90%  
Subsidiary - HG Global | Preferred Stock      
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]      
Basic ownership 96.90% 96.90%  
Subsidiary - HG Global | Common equity securities      
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]      
Basic ownership 88.40% 88.40%  
Subsidiary - Distinguished Managing General Agent      
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]      
Basic ownership 55.50% 55.50% 55.50%
Ownership percentage, fully diluted 43.60% 43.60% 43.60%