Fair Value Measurement - Significant Inputs and Assumptions (Details) - Valuation Technique, Discounted Cash Flow - Fair Value, Inputs, Level 3	Sep. 30, 2022	Dec. 31, 2021
Minimum | Discount rate | Loans (at fair value)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loan receivable, measurement input	5.90%	3.42%
Minimum | Discount rate | Notes Receivable
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loan receivable, measurement input	5.79%	4.96%
Minimum | Credit risk rate | Loans (at fair value)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loan receivable, measurement input	0.01%	0.08%
Minimum | Credit risk rate | Notes Receivable
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loan receivable, measurement input	0.81%	0.04%
Minimum | Prepayment rate | Loans (at fair value)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loan receivable, measurement input	0.14%	8.70%
Minimum | Prepayment rate | Notes Receivable
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loan receivable, measurement input	15.60%	15.60%
Maximum | Discount rate | Loans (at fair value)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loan receivable, measurement input	20.88%	16.49%
Maximum | Discount rate | Notes Receivable
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loan receivable, measurement input	20.35%	15.72%
Maximum | Credit risk rate | Loans (at fair value)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loan receivable, measurement input	93.09%	55.79%
Maximum | Credit risk rate | Notes Receivable
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loan receivable, measurement input	50.69%	50.69%
Maximum | Prepayment rate | Loans (at fair value)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loan receivable, measurement input	93.43%	88.12%
Maximum | Prepayment rate | Notes Receivable
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loan receivable, measurement input	35.03%	36.08%
Weighted Average | Discount rate | Loans (at fair value)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loan receivable, measurement input	10.80%	7.29%
Weighted Average | Discount rate | Notes Receivable
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loan receivable, measurement input	11.21%	6.78%
Weighted Average | Credit risk rate | Loans (at fair value)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loan receivable, measurement input	17.40%	17.98%
Weighted Average | Credit risk rate | Notes Receivable
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loan receivable, measurement input	18.73%	18.47%
Weighted Average | Prepayment rate | Loans (at fair value)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loan receivable, measurement input	39.47%	40.35%
Weighted Average | Prepayment rate | Notes Receivable
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loan receivable, measurement input	28.03%	27.82%