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Fair Value of Financial Instruments - Investment in BFG Level 3 Recurring Asset (Details)	Sep. 30, 2023	Dec. 31, 2022	Dec. 31, 2019
Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment, measurement input			0.0450
Discounted Cash Flows | Level 3 | Revenue growth rate | Fair Value, Recurring | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment, measurement input	0.105	0.108
Discounted Cash Flows | Level 3 | Expense growth rate | Fair Value, Recurring | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment, measurement input	0.139	0.115
Discounted Cash Flows | Level 3 | Discount rate | Fair Value, Recurring | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment, measurement input	0.275	0.300
Guideline Public Company | Level 3 | Multiples of enterprise value | Fair Value, Recurring | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment, measurement input	2.8	3.0
Guideline Public Company | Level 3 | Multiples of enterprise value | Fair Value, Recurring | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment, measurement input	5.0	5.0

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