v3.26.1
Presentation of Financial Statements and Significant Accounting Policies - Narrative (Details) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 04, 2026
Apr. 30, 2026
May 31, 2025
Sep. 30, 2024
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Dec. 31, 2024
Jul. 31, 2026
Accounts, Notes, Loans and Financing Receivable [Line Items]                      
Settlement amount   $ 1,500 $ 147,000 $ 186,000              
Related accrued interest     14,100 9,300              
Future MUD receivables   26,100 95,900 40,000              
Total cash consideration   17,500 180,000 176,700              
Cash consideration allocated to sale of existing MUD receivables   900 112,800 146,700              
Cash consideration allocated to future receivables   16,600 67,200 $ 30,000              
Loss on sale of MUD receivables   $ 600 $ 48,200             $ 48,700  
Remaining liability         $ 71,100   $ 71,100   $ 64,400    
Total unamortized discount         14,400   14,400   12,800    
Amortization and accretion of investment securities         3,200 $ 6,700 7,900 $ 9,200      
Long-lived asset, held and used, impairment loss         0 0 0 0      
Equity method investment, impairment         0 0 0 0      
Total assets         15,910,043   15,910,043   10,639,461    
Noncontrolling interests         73,577   73,577   66,790    
Cash and cash equivalents         2,647,959 1,441,026 2,647,959 1,441,026 1,468,507    
Net earned insurance premiums         97,247 $ 0 97,247 $ 0      
Amortized cost basis of financing receivables         672,700   672,700   560,300    
Accrued interest on financing receivables         $ 56,200   $ 56,200   48,200    
Financing receivable threshold period past due         30 days   30 days        
Fair Value Measured at Net Asset Value Per Share                      
Accounts, Notes, Loans and Financing Receivable [Line Items]                      
Other equity investments         $ 5,600   $ 5,600        
Subsequent Event                      
Accounts, Notes, Loans and Financing Receivable [Line Items]                      
Total cash consideration                     $ 58,600
Floreo Joint Venture                      
Accounts, Notes, Loans and Financing Receivable [Line Items]                      
Related party receivables         6,000            
Vantage Group Holdings Ltd.                      
Accounts, Notes, Loans and Financing Receivable [Line Items]                      
Acquisition interest 100.00%                    
Total consideration $ 2,100,000                    
Value of business acquired (VOBA) $ 304,000                    
Expected amortization, percentage, year one 90.00%                    
Expected amortization, percentage, year two 9.00%                    
Expected amortization, percentage, year three 1.00%                    
Total assets         6,298,578   $ 6,298,578   $ 0    
Vantage Group Holdings Ltd. | Private Placement | Series A Preferred Stock                      
Accounts, Notes, Loans and Financing Receivable [Line Items]                      
Sale of stock, consideration received on transaction $ 1,000,000                    
Teravalis Acquisition                      
Accounts, Notes, Loans and Financing Receivable [Line Items]                      
Ownership interest             88.00%   88.00%    
Percentage of minimum required capital contribution             12.00%   12.00%    
Total assets         545,400   $ 545,400   $ 543,900    
Noncontrolling interests         $ 65,400   $ 65,400   $ 65,200    
Ilima Acquisition                      
Accounts, Notes, Loans and Financing Receivable [Line Items]                      
Variable interest entity predevelopment activity percentage             1        
Variable interest entity contribution amount             $ 5,000        
Ilima Acquisition | Ilima                      
Accounts, Notes, Loans and Financing Receivable [Line Items]                      
Variable interest entity ownership percentage             100.00%   100.00%    
AdVantage Reinsurance Bermuda Ltd                      
Accounts, Notes, Loans and Financing Receivable [Line Items]                      
Reinsurance, premium, percentage assumed to net         2.20%   2.20%        
Net earned insurance premiums         $ 1,000   $ 1,000        
Fee and other income (losses)         4,900   $ 4,900        
AdVantage Reinsurance Bermuda Ltd | AV0002                      
Accounts, Notes, Loans and Financing Receivable [Line Items]                      
Variable interest entity ownership percentage             50.00%        
Cash and cash equivalents         $ 24,100   $ 24,100