v3.26.1
Investments - Additional Information (Details)
$ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2026
USD ($)
loan
security
issuer
Issue
Dec. 31, 2025
USD ($)
loan
issuer
security
Issue
Mar. 31, 2026
USD ($)
Jun. 30, 2025
USD ($)
Mar. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Debt Securities, Available-for-sale [Line Items]            
Investment funds, unfunded commitments $ 762,000          
Fixed maturity, portfolio issues | Issue 2,628 2,576        
Fixed portfolio, number of issuers | issuer 1,013 1,010        
Amortized Cost $ 19,307,295 $ 18,820,464        
Fixed maturities, available for sale, allowance for credit losses 3,297 3,297 $ 3,297 $ 10,355 $ 10,355 $ 10,395
Mortgage loans $ 425,513 428,517        
Number of loans | loan 37          
Number of loans collaterally dependent | loan 0          
Increase (decrease) in allowance for credit losses $ 251          
Allowance for credit losses 4,766 4,515 $ 4,656 $ 6,629 $ 6,731 $ 7,644
Commercial Portfolio Segment            
Debt Securities, Available-for-sale [Line Items]            
Mortgage loans $ 1,010,000 $ 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 $ 18,000          
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 1 1        
Outstanding principal on nonaccrual loan $ 1,000 $ 1,000        
Fixed maturities available for sale            
Debt Securities, Available-for-sale [Line Items]            
Investment funds, unfunded commitments 354,000 $ 313,000        
Investment in Limited Partnerships            
Debt Securities, Available-for-sale [Line Items]            
Investment funds, unfunded commitments 761,646          
Capital called from investment funds $ 75,000