v3.26.1
FAIR VALUE MEASUREMENTS - Unobservable Units (Details)
$ in Thousands
Jun. 30, 2026
USD ($)
Dec. 31, 2025
USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans held for investment, at fair value $ 721,568 $ 281,198
Residuals in securitizations, at fair value 204,001 76,701
Servicing asset 12,456 15,358
Equity warrants 168 81
Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans held for investment, at fair value 721,568 281,198
Loans, held for sale, fair value disclosure 500,783 647,370
Residuals in securitizations, at fair value 204,001 76,701
Servicing asset 12,456 15,358
Equity warrants 168 81
Joint Ventures and Other Investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments 43,766 47,719
Joint Ventures and Other Investments | Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments 36,806 38,856
Unguaranteed Investments Accrual | Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans held for investment, at fair value 611,953 208,655
Unguaranteed Investments Non-Accrual | Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans held for investment, at fair value $ 109,615 72,543
Market yields | Joint Ventures and Other Investments | Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments   $ 38,856
Weighted Average | Market yields    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans, held for sale, measurement input 0.0766 0.0719
Residuals in Securitizations, at FV, measurement input 0.0811 0.0758
Servicing assets, measurement input 0.1125 0.1125
Weighted Average | Market yields | Joint Ventures and Other Investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, measurement input 0.0815 0.0740
Weighted Average | Market yields | Unguaranteed Investments Accrual    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans held for investment, measurement input 0.0557 0.0655
Weighted Average | Market yields | Unguaranteed Investments Non-Accrual    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans held for investment, measurement input 0.0726 0.0700
Weighted Average | Cumulative prepayment rate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans, held for sale, measurement input 0.5482 0.5617
Servicing assets, measurement input 0.2250 0.2250
Weighted Average | Cumulative prepayment rate | Unguaranteed Investments Accrual    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans held for investment, measurement input 0.2250 0.2250
Weighted Average | Average cumulative default rate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans, held for sale, measurement input 0.0982 0.1117
Servicing assets, measurement input 0.2100 0.2100
Weighted Average | Average cumulative default rate | Unguaranteed Investments Accrual    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans held for investment, measurement input 0.2100 0.2100
Weighted Average | Average cumulative default rate | Unguaranteed Investments Non-Accrual    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans held for investment, measurement input 0.3000 0.3000
Weighted Average | Cost    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Residuals in Securitizations, at FV, measurement input 0.1400 0.1400
Weighted Average | Cost | Joint Ventures and Other Investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, measurement input 0.1400 0.1400
Weighted Average | Weighted average cost of capital    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Residuals in Securitizations, at FV, measurement input 0.0800 0.0900
Weighted Average | Weighted average cost of capital | Joint Ventures and Other Investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, measurement input 0.0800 0.0900
Weighted Average | Expected volatility    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity warrants, measurement input 0.4500 0.4500
Weighted Average | Dividend yield    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity warrants, measurement input 0.0670 0.0670
Weighted Average | Risk free rate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity warrants, measurement input 0.0395 0.0395
Minimum | Market yields    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans, held for sale, measurement input 0.0689 0.0643
Residuals in Securitizations, at FV, measurement input 0.0809 0.0758
Servicing assets, measurement input 0.1125 0.1125
Minimum | Market yields | Joint Ventures and Other Investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, measurement input 0.0809 0.0671
Minimum | Market yields | Unguaranteed Investments Accrual    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans held for investment, measurement input 0.0540 0.0655
Minimum | Market yields | Unguaranteed Investments Non-Accrual    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans held for investment, measurement input 0.0700 0.0700
Minimum | Cumulative prepayment rate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans, held for sale, measurement input 0.5000 0.5000
Servicing assets, measurement input 0.2250 0.2250
Minimum | Cumulative prepayment rate | Unguaranteed Investments Accrual    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans held for investment, measurement input 0.2250 0.2250
Minimum | Average cumulative default rate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans, held for sale, measurement input 0.0500 0.0500
Servicing assets, measurement input 0.2100 0.2100
Minimum | Average cumulative default rate | Unguaranteed Investments Accrual    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans held for investment, measurement input 0.2100 0.2100
Minimum | Average cumulative default rate | Unguaranteed Investments Non-Accrual    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans held for investment, measurement input 0.3000 0.3000
Minimum | Cost    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Residuals in Securitizations, at FV, measurement input 0.1200 0.1200
Minimum | Cost | Joint Ventures and Other Investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, measurement input 0.1200 0.1200
Minimum | Weighted average cost of capital    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Residuals in Securitizations, at FV, measurement input 0.0600 0.0700
Minimum | Weighted average cost of capital | Joint Ventures and Other Investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, measurement input 0.0600 0.0700
Minimum | Expected volatility    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity warrants, measurement input 0.4500 0.4500
Minimum | Dividend yield    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity warrants, measurement input 0.0670 0.0670
Minimum | Risk free rate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity warrants, measurement input 0.0395 0.0395
Maximum | Market yields    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans, held for sale, measurement input 0.0904 0.0813
Residuals in Securitizations, at FV, measurement input 0.0859 0.0758
Servicing assets, measurement input 0.1125 0.1125
Maximum | Market yields | Joint Ventures and Other Investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, measurement input 0.0859 0.1249
Maximum | Market yields | Unguaranteed Investments Accrual    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans held for investment, measurement input 0.0600 0.0655
Maximum | Market yields | Unguaranteed Investments Non-Accrual    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans held for investment, measurement input 0.0859 0.0700
Maximum | Cumulative prepayment rate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans, held for sale, measurement input 0.6000 0.6000
Servicing assets, measurement input 0.2250 0.2250
Maximum | Cumulative prepayment rate | Unguaranteed Investments Accrual    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans held for investment, measurement input 0.2250 0.2250
Maximum | Average cumulative default rate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans, held for sale, measurement input 0.1500 0.1500
Servicing assets, measurement input 0.2100 0.2100
Maximum | Average cumulative default rate | Unguaranteed Investments Accrual    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans held for investment, measurement input 0.2100 0.2100
Maximum | Average cumulative default rate | Unguaranteed Investments Non-Accrual    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans held for investment, measurement input 0.3000 0.3000
Maximum | Cost    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Residuals in Securitizations, at FV, measurement input 0.1600 0.1600
Maximum | Cost | Joint Ventures and Other Investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, measurement input 0.1600 0.1600
Maximum | Weighted average cost of capital    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Residuals in Securitizations, at FV, measurement input 0.1000 0.1100
Maximum | Weighted average cost of capital | Joint Ventures and Other Investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, measurement input 0.1000 0.1100
Maximum | Expected volatility    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity warrants, measurement input 0.4500 0.4500
Maximum | Dividend yield    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity warrants, measurement input 0.0670 0.0670
Maximum | Risk free rate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity warrants, measurement input 0.0395 0.0395