v3.26.1
Investments - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2024
Mar. 31, 2026
Dec. 31, 2025
Debt Securities, Available-for-sale [Line Items]      
Asset, held-in-Trust   $ 344,400 $ 336,400
Cash and Cash Equivalents      
Debt Securities, Available-for-sale [Line Items]      
Asset, held-in-Trust   40,100 35,200
Limited Partnership      
Debt Securities, Available-for-sale [Line Items]      
Purchase obligation, term 10 years    
Purchase obligation   8,600  
Private Placement Investments      
Debt Securities, Available-for-sale [Line Items]      
Purchase obligation   248,200  
Deposits      
Debt Securities, Available-for-sale [Line Items]      
Assets held by insurance regulators   $ 19,000 $ 21,300
Financial Services Sector      
Debt Securities, Available-for-sale [Line Items]      
Fixed maturity securities portfolio, percentage   32.00%  
Technology And Communications Sector      
Debt Securities, Available-for-sale [Line Items]      
Fixed maturity securities portfolio, percentage   10.00%  
Non-Cyclical Consumer Sector      
Debt Securities, Available-for-sale [Line Items]      
Fixed maturity securities portfolio, percentage   12.00%  
Utilities Industry Group      
Debt Securities, Available-for-sale [Line Items]      
Fixed maturity securities portfolio, percentage   13.00%  
Energy Sector      
Debt Securities, Available-for-sale [Line Items]      
Fixed maturity securities portfolio, percentage   10.00%  
Capital Goods      
Debt Securities, Available-for-sale [Line Items]      
Fixed maturity securities portfolio, percentage   10.00%