Fair Value Disclosures - Summary of Amount by Which Contractual Principal Exceeds Fair Value for Loans and Other Receivables Measured at Fair Value under Fair Value Option (Details) - USD ($) $ in Thousands	Feb. 28, 2021	Nov. 30, 2020
Financial instruments owned:
Loans and other receivables	$ 5,826,957	$ 1,662,647
Loans and other receivables on nonaccrual status and/or 90 days or greater past due	252,790	287,889
Long-term debt and short-term borrowings	(53,138)	(42,819)
Other secured financings	2,782	2,782
Loans and other receivables 90 days or greater past due	$ 30,200	$ 30,000