v3.26.1
Comprehensive Income - Schedule of Amounts Reclassed Out of Each Component of Accumulated Other Comprehensive Income (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Income tax expense (benefit) $ 481 $ 617  
Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, Unrealized Gain (Loss) Arising During Period, after Tax 0 442  
Net of tax and noncontrolling interest (6,851) (46,391)  
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax 3 4,901  
Realized Investment Gains (Losses) 3 (3)  
Allowance for Credit Loss, Receivable, Other, Current 350   $ 350
Unrealized Gains (Losses) on Available-for-Sale Securities [Member]      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Net of tax and noncontrolling interest 3 4,459  
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax 3 4,459  
Realized Investment Gains (Losses) 3 5,957  
Accumulated Gain (Loss), Financial Liability, Fair Value Option, Attributable to Parent [Member]      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, Unrealized Gain (Loss) Arising During Period, after Tax 0 (442)  
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax 0 442  
Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, before Tax, after Reclassification Adjustment 0 589  
Accumulated Translation Adjustment [Member]      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax 0 0  
Accumulated Translation Adjustment [Member] | Discontinued Operations, Disposed of by Sale | Ambac Assurance Corporation [Member]      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Credit Risk Changes of Fair Value, Net Loss on Discontinued Operation 0    
Reclassification out of Accumulated Other Comprehensive Income [Member]      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Net of tax and noncontrolling interest 3 4,901  
Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized Gains (Losses) on Available-for-Sale Securities [Member]      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Income tax expense (benefit) 0 1,498  
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Gain (Loss), Financial Liability, Fair Value Option, Including Portion Attributable to Noncontrolling Interest [Member]      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Income tax expense (benefit) $ 0 $ 147