v3.26.3
Servicing Rights - Key Assumptions and the Sensitivity of the Fair Value (Details)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2026
USD ($)
$ / loan
Dec. 31, 2025
USD ($)
$ / loan
Jun. 30, 2026
USD ($)
Sep. 30, 2025
USD ($)
Jun. 30, 2025
USD ($)
Dec. 31, 2024
USD ($)
Servicing Assets at Fair Value [Line Items]            
Balance of mortgage loans serviced for others $ 1,703,168 $ 1,629,528        
Weighted average rate of note (percent) 4.87% 4.77%        
MSR as a percentage of serviced loans 1.86% 1.69%        
Mortgage servicing rights            
Servicing Assets at Fair Value [Line Items]            
Fair value of MSRs $ 31,730 $ 27,474 $ 28,475 $ 27,796 $ 27,506 $ 26,439
Expected weighted-average life (in years) 9 years 6 months 18 days 8 years 9 months 25 days        
Key assumptions:            
Constant prepayment rate (percent) 9.05% 10.01%        
Impact on fair value from 10% adverse change $ (1,116) $ (1,022)        
Impact on fair value from 25% adverse change $ (3,430) $ (2,427)        
Discount rate 10.00% 10.97%        
Impact on fair value from 100 basis point increase $ (1,277) $ (871)        
Impact on fair value from 200 basis point increase $ (2,453) $ (1,864)        
Cost to service assumptions ($ per loan) | $ / loan 81 81        
Impact on fair value from 10% adverse change $ (252) $ (239)        
Impact on fair value from 25% adverse change $ (630) $ (597)