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Related Party Transactions - Narrative (Details) $ in Thousands	Feb. 28, 2026 USD ($) directorAndOfficer	Nov. 30, 2025 USD ($) directorAndOfficer
Related Party Transaction [Line Items]
Other assets	$ 3,468,545	$ 3,246,706
Number of directors and officers with investments | directorAndOfficer	2	2
Investments in and loans to related parties	$ 1,560,602	$ 1,496,125
Officers And Employees
Related Party Transaction [Line Items]
Other assets	16,700	19,200
Director
Related Party Transaction [Line Items]
Investments in and loans to related parties	$ 10,500	$ 10,400

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