v3.26.1
Fair Value Measurement - Schedule of Significant Unobservable Inputs (Details) - Valuation Technique, Discounted Cash Flow
 3 Months Ended 12 Months Ended
Mar. 31, 2026
Dec. 31, 2025
Minimum | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Beneficial interest assets 6.50% 6.50%
Beneficial interest liabilities 10.40% 13.25%
Minimum | Credit risk rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Beneficial interest assets (9.13%) (7.59%)
Beneficial interest liabilities (5.51%) (5.45%)
Minimum | Prepayment rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Beneficial interest assets (8.51%) (7.56%)
Maximum | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Beneficial interest assets 14.50% 14.50%
Beneficial interest liabilities 12.75% 13.25%
Maximum | Credit risk rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Beneficial interest assets 12.73% 13.42%
Beneficial interest liabilities 7.92% 9.18%
Maximum | Prepayment rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Beneficial interest assets 16.58% 15.50%
Weighted Average | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Beneficial interest assets 12.44% 12.90%
Beneficial interest liabilities 12.72% 13.25%
Weighted Average | Credit risk rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Beneficial interest assets 1.81% 0.89%
Beneficial interest liabilities 2.28% 1.90%
Weighted Average | Prepayment rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Beneficial interest assets 3.17% 3.60%
Fair Value, Inputs, Level 3 | Minimum | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Loans receivable 5.48% 5.00%
Loans held in consolidated securitization 0.0690 0.0699
Discount rate 0.0650 0.0650
Notes receivable and residual certificates 0.0608 0.0575
Payable to securitization note holders 0.0690 0.0699
Trailing fee liabilities 5.48% 5.00%
Fair Value, Inputs, Level 3 | Minimum | Credit risk rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Loans receivable 0.01% 0.01%
Loans held in consolidated securitization 0.0067 0.0067
Notes receivable and residual certificates 0.0038 0.0038
Payable to securitization note holders 0.0067 0.0067
Trailing fee liabilities 0.02% 0.04%
Fair Value, Inputs, Level 3 | Minimum | Prepayment rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Loans receivable 0.45% 0.45%
Loans held in consolidated securitization 0.0673 0.0673
Notes receivable and residual certificates 0.0411 0.0411
Payable to securitization note holders 0.0673 0.0673
Trailing fee liabilities 0.89% 1.52%
Fair Value, Inputs, Level 3 | Maximum | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Loans receivable 15.05% 14.78%
Loans held in consolidated securitization 0.1500 0.1500
Discount rate 0.0650 0.0650
Notes receivable and residual certificates 0.1505 0.1278
Payable to securitization note holders 0.1060 0.1040
Trailing fee liabilities 15.05% 14.78%
Fair Value, Inputs, Level 3 | Maximum | Credit risk rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Loans receivable 91.50% 91.50%
Loans held in consolidated securitization 0.3568 0.3568
Notes receivable and residual certificates 0.4474 0.5028
Payable to securitization note holders 0.3568 0.3568
Trailing fee liabilities 67.59% 67.59%
Fair Value, Inputs, Level 3 | Maximum | Prepayment rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Loans receivable 99.75% 99.75%
Loans held in consolidated securitization 0.8984 0.8984
Notes receivable and residual certificates 0.9344 0.9577
Payable to securitization note holders 0.8984 0.8984
Trailing fee liabilities 95.53% 95.77%
Fair Value, Inputs, Level 3 | Weighted Average | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Loans receivable 9.88% 9.51%
Loans held in consolidated securitization 0.1104 0.1043
Discount rate 0.0650 0.0650
Notes receivable and residual certificates 0.1043 0.1072
Payable to securitization note holders 0.1032 0.0965
Trailing fee liabilities 10.03% 10.15%
Fair Value, Inputs, Level 3 | Weighted Average | Credit risk rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Loans receivable 16.92% 15.52%
Loans held in consolidated securitization 0.1620 0.1612
Notes receivable and residual certificates 0.2127 0.2110
Payable to securitization note holders 0.1620 0.1612
Trailing fee liabilities 19.62% 19.48%
Fair Value, Inputs, Level 3 | Weighted Average | Prepayment rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Loans receivable 41.98% 43.41%
Loans held in consolidated securitization 0.4025 0.4050
Notes receivable and residual certificates 0.3356 0.3304
Payable to securitization note holders 0.4025 0.4050
Trailing fee liabilities 34.65% 34.59%