Fair Value Measurements - Unobservable Inputs Assumptions - Securitized Debt (Details) - Loans held for investment - Level 3 - Variable Interest Entities, Primary Beneficiary	Jun. 30, 2026	Dec. 31, 2025
Discount Rate \| Minimum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Significant Inputs	0.05	0.04
Discount Rate \| Maximum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Significant Inputs	0.08	0.08
Discount Rate \| Weighted Average
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Significant Inputs	0.059	0.054
Prepay Rate \| Minimum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Significant Inputs	0.06	0.06
Prepay Rate \| Maximum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Significant Inputs	0.20	0.20
Prepay Rate \| Weighted Average
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Significant Inputs	0.084	0.081
CDR \| Minimum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Significant Inputs	0	0
CDR \| Maximum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Significant Inputs	0.04	0.04
CDR \| Weighted Average
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Significant Inputs	0.005	0.005
Loss Severity \| Minimum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Significant Inputs	0.20	0.20
Loss Severity \| Maximum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Significant Inputs	0.45	0.50
Loss Severity \| Weighted Average
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Significant Inputs	0.332	0.339