Investments in Unconsolidated Entities - Outstanding Debt Obligations (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Jul. 31, 2025	Oct. 31, 2024
Schedule of Equity Method Investments [Line Items]
Aggregate loan commitments	$ 4,350,744	$ 4,275,887
Debt obligations borrowed in the aggregate	3,384,777	3,180,718
Variable Interest Entity
Schedule of Equity Method Investments [Line Items]
Our maximum estimated exposure under repayment and carry cost guarantees if the full amount of the debt obligations were borrowed	20,600	102,300
Equity Method Investee
Schedule of Equity Method Investments [Line Items]
Estimated fair value of guarantees provided by us related to debt and other obligations	17,000	17,400
Indirect Guarantee of Indebtedness | Equity Method Investee
Schedule of Equity Method Investments [Line Items]
Aggregate loan commitments	2,651,700	3,031,500
Our maximum estimated exposure under repayment and carry cost guarantees if the full amount of the debt obligations were borrowed	574,800	646,900
Debt obligations borrowed in the aggregate	1,939,600	2,204,300
Our maximum estimated exposure under repayment and carry cost guarantees of the debt obligations borrowed	$ 523,000	$ 560,400
Indirect Guarantee of Indebtedness | Equity Method Investee | Minimum
Schedule of Equity Method Investments [Line Items]
Terms of guarantees	1 month	1 month
Indirect Guarantee of Indebtedness | Equity Method Investee | Maximum
Schedule of Equity Method Investments [Line Items]
Terms of guarantees	8 years 4 months 24 days	3 years