v3.26.1
Mortgage Servicing Rights - Summary of Key Unobservable Inputs Used in Determining the Fair Value (Details) - MSR - USD ($)
 3 Months Ended 12 Months Ended
Mar. 31, 2026
Dec. 31, 2025
Minimum    
Servicing Assets at Fair Value [Line Items]    
Discount rates (as a percent) 7.60% 7.80%
Annual prepayment speeds (as a percent) 6.60% 5.40%
Cost of servicing $ 74 $ 74
Maximum    
Servicing Assets at Fair Value [Line Items]    
Discount rates (as a percent) 12.50% 13.70%
Annual prepayment speeds (as a percent) 17.60% 22.10%
Cost of servicing $ 150 $ 149
Weighted Average    
Servicing Assets at Fair Value [Line Items]    
Discount rates (as a percent) 9.10% 9.40%
Annual prepayment speeds (as a percent) 9.00% 10.30%
Cost of servicing $ 86 $ 87