v3.26.1
Fair Value Measurement - Schedule of Level 3 Fair Value Assumptions for Loan Servicing Assets and Liabilities (Details) - Fair Value, Inputs, Level 3 - Valuation Technique, Discounted Cash Flow
3 Months Ended 12 Months Ended
Mar. 31, 2026
Dec. 31, 2025
Minimum    
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]    
Discount rate 13.00% 13.00%
Credit risk rate 0.01% 0.01%
Market-servicing rate 0.62% 0.62%
Prepayment rate 0.73% 1.96%
Minimum | Auto Loans    
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]    
Market-servicing rate 1.16% 1.16%
Minimum | Personal Loans    
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]    
Market-servicing rate 0.62% 0.62%
Maximum    
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]    
Discount rate 20.00% 20.00%
Credit risk rate 73.91% 61.96%
Market-servicing rate 2.69% 2.69%
Prepayment rate 96.90% 96.90%
Maximum | Auto Loans    
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]    
Market-servicing rate 2.69% 2.69%
Maximum | Personal Loans    
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]    
Market-servicing rate 2.00% 2.00%
Weighted Average    
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]    
Discount rate 17.31% 17.32%
Credit risk rate 17.03% 17.01%
Market-servicing rate 0.66% 0.65%
Prepayment rate 36.22% 36.50%