Fair Value Measurements - Quantitations and Assumptions for Fair Value of Assets Serviced by Third Party (Details) - Level 3 - Fair Value, Measurements, Recurring	9 Months Ended
	Sep. 30, 2023
Weighted Average | Warrant | Measurement Input, Price Volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Volatility	0.264
Weighted Average | Corporate Debt Securities | Spread to 10 Year Treasury
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Volatility	0.053
Weighted Average | Corporate Debt Securities | Discount Rates
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Volatility	0.099
Minimum | Warrant | Measurement Input, Price Volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Volatility	0.138
Minimum | Corporate Debt Securities | Spread to 10 Year Treasury
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Corporate Debt, Measurement Input	4.20%
Minimum | Corporate Debt Securities | Measurement Input, Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Corporate Debt, Measurement Input	8.80%
Maximum | Warrant | Measurement Input, Price Volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Volatility	1.538
Maximum | Corporate Debt Securities | Spread to 10 Year Treasury
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Corporate Debt, Measurement Input	6.50%
Maximum | Corporate Debt Securities | Measurement Input, Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Corporate Debt, Measurement Input	11.10%