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Debt (Details) - USD ($)
$ in Thousands
12 Months Ended
Nov. 10, 2025
Mar. 27, 2025
Aug. 10, 2023
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Apr. 15, 2024
Apr. 08, 2024
Mar. 17, 2020
Debt                  
Variable interest rate basis     SOFR            
Revolving Credit Agreement | Prime rate                  
Debt                  
Variable interest rate basis     prime rate            
Revolving Credit Agreement | Federal Funds Effective Swap Rate                  
Debt                  
Spread on variable rate (as a percent)     1.25%            
RBS Citizens                  
Debt                  
Proceeds from loan       $ 50,000          
RBS Citizens | Revolving Credit Agreement                  
Debt                  
Current borrowing capacity     $ 30,000 30,000          
Maximum borrowing capacity     $ 50,000            
Default trigger, principal amount       10,000          
Proceeds from loan $ 20,000 $ 30,000              
Outstanding amount       $ 50,000 $ 0        
Commitment fee (as a percent)       0.20%          
Fair value of loan       $ 53,386 0        
Interest expense, borrowings       1,441 60        
RBS Citizens | Revolving Credit Agreement | Federal Funds Effective Swap Rate                  
Debt                  
Spread on variable rate (as a percent)     0.50%            
RBS Citizens | Revolving Credit Agreement | SOFR                  
Debt                  
Spread on variable rate (as a percent) 1.25% 1.25%              
F H L B Boston                  
Debt                  
Proceeds from loan         15,000 $ 20,000      
Outstanding amount             $ 5,000 $ 10,000 $ 30,000
Maximum borrowing capacity using eligible invested assets as collateral       269,294          
Advance term             7 days 7 days 5 years
Interest expense, borrowings       89 449        
F H L B Boston | Residential mortgage-backed securities                  
Debt                  
Fair value of loan         47,341        
F H L B Boston | Interest-bearing FHLB                  
Debt                  
Interest rate percentage             5.52% 5.50% 1.42%
Level 2 Inputs | F H L B Boston                  
Debt                  
Current borrowing capacity       $ 0 $ 30,088