Fair Value Measurements - Schedule of Assumptions Used (Details) $ in Thousands	Sep. 30, 2023 USD ($)
Private equity funds
Schedule of Equity Method Investments [Line Items]
Fair Value	$ 5,739
Direct equity investments
Schedule of Equity Method Investments [Line Items]
Fair Value	6,634
Discounted cash flow | Direct credit investments | VIE
Schedule of Equity Method Investments [Line Items]
Investments	46,566
Recent precedent transactions | Direct credit investments | VIE
Schedule of Equity Method Investments [Line Items]
Investments	$ 22,815
Selected market return | Adjusted net asset value | Minimum | Private equity funds
Schedule of Equity Method Investments [Line Items]
Range of and weighted-average inputs	0.006
Selected market return | Adjusted net asset value | Maximum | Private equity funds
Schedule of Equity Method Investments [Line Items]
Range of and weighted-average inputs	0.015
Selected market return | Adjusted net asset value | Weighted Average | Private equity funds
Schedule of Equity Method Investments [Line Items]
Range of and weighted-average inputs	0.013
EBITDA multiple | Market approach | Minimum | Direct equity investments
Schedule of Equity Method Investments [Line Items]
Range of and weighted-average inputs	8.25
EBITDA multiple | Market approach | Maximum | Direct equity investments
Schedule of Equity Method Investments [Line Items]
Range of and weighted-average inputs	14.5
EBITDA multiple | Market approach | Weighted Average | Direct equity investments
Schedule of Equity Method Investments [Line Items]
Range of and weighted-average inputs	12.15
Equity multiple | Market approach | Weighted Average | Direct equity investments
Schedule of Equity Method Investments [Line Items]
Range of and weighted-average inputs	1.6
Market yield | Discounted cash flow | Minimum | Direct credit investments | VIE
Schedule of Equity Method Investments [Line Items]
Range of and weighted-average inputs	0.093
Market yield | Discounted cash flow | Maximum | Direct credit investments | VIE
Schedule of Equity Method Investments [Line Items]
Range of and weighted-average inputs	0.118
Market yield | Discounted cash flow | Weighted Average | Direct credit investments | VIE
Schedule of Equity Method Investments [Line Items]
Range of and weighted-average inputs	0.106