v3.26.1
Investments - Additional Information (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2026
USD ($)
issuer
Issue
loan
security
Mar. 31, 2025
USD ($)
security
Dec. 31, 2025
USD ($)
loan
Issue
issuer
Dec. 31, 2024
USD ($)
Debt Securities, Available-for-sale [Line Items]        
Investment funds, unfunded commitments $ 811,000      
Fixed maturity, portfolio issues | Issue 2,600   2,576  
Fixed portfolio, number of issuers | issuer 1,015   1,010  
Amortized Cost $ 19,133,385   $ 18,820,464  
Fixed maturities, available for sale, allowance for credit losses 3,297 $ 10,355 3,297 $ 10,395
Mortgage loans $ 461,025   428,517  
Number of loans | loan 39      
Number of loans collaterally dependent | loan 0      
Increase (decrease) in allowance for credit losses $ 100      
Allowance for credit losses 4,656 $ 6,731 4,515 $ 7,644
Commercial Portfolio Segment        
Debt Securities, Available-for-sale [Line Items]        
Mortgage loans $ 1,040,000   $ 1,040,000  
Number of delinquent loans | loan 0   0  
Commercial Portfolio Segment | Unfunded Loan Commitment        
Debt Securities, Available-for-sale [Line Items]        
Mortgage loans $ 21,000      
Senior Loans on Non Accrual Status        
Debt Securities, Available-for-sale [Line Items]        
Number of fixed maturities securities | security 1 2    
Amortized Cost $ 5,500   $ 9,200  
Fixed maturities, available for sale, allowance for credit losses $ 3,300   $ 3,300  
Nonaccrual Loans | Commercial Portfolio Segment        
Debt Securities, Available-for-sale [Line Items]        
Number of loans | loan 2   2  
Outstanding principal on nonaccrual loan $ 3,000   $ 3,000  
Fixed maturities available for sale        
Debt Securities, Available-for-sale [Line Items]        
Investment funds, unfunded commitments 340,000   $ 313,000  
Investment in Limited Partnerships        
Debt Securities, Available-for-sale [Line Items]        
Investment funds, unfunded commitments 810,523      
Capital called from investment funds $ 11,000