Fair Value Measurements - Unobservable Inputs Assumptions - Securitized Debt (Details) - Loans held for investment - Level 3 - Variable Interest Entities, Primary Beneficiary	Mar. 31, 2025	Dec. 31, 2024
Discount Rate | Minimum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Significant Inputs	0.05	0.05
Discount Rate | Maximum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Significant Inputs	0.09	0.09
Discount Rate | Weighted Average Borrowing Rates
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Significant Inputs	0.060	0.060
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	0.15	0.15
Prepay Rate | Weighted Average Borrowing Rates
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Significant Inputs	0.077	0.075
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	0.05
CDR | Weighted Average Borrowing Rates
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Significant Inputs	0.005	0.006
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	0.50	0.55
Loss Severity | Weighted Average Borrowing Rates
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Significant Inputs	0.343	0.355