v3.26.1
INVESTMENTS - Mortgage Loans (Narrative) (Details)
$ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2026
USD ($)
loan
Dec. 31, 2025
USD ($)
loan
Mar. 31, 2026
USD ($)
Jun. 30, 2025
USD ($)
Mar. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Debt and Equity Securities, FV-NI [Line Items]            
Weighted average debt service coverage ratios 1.5 1.6        
Weighted average loan-to-value ratios (as a percent) 83.00% 84.00%        
Number of commercial mortgage loans, past due | loan 3 2        
Commercial mortgage loans, past due amount $ 20,000 $ 14,000        
Allowance for expected credit losses $ 27,957 $ 29,742 $ 29,308 $ 27,335 $ 25,862 $ 23,378
Sector Concentration | Mortgage Loans | Mortgage Loans            
Debt and Equity Securities, FV-NI [Line Items]            
Representation (as a percent) 46.00% 51.00%