Collateralized Transactions - Cash and Securities Segregated (Details) - USD ($) $ in Thousands	Feb. 29, 2024	Nov. 30, 2023
Investments, Debt and Equity Securities [Abstract]
Cash and securities segregated and on deposit for regulatory purposes or deposited with clearing and depository organizations	$ 1,195,346	$ 1,414,593
Securities purchased under agreements to resell	140,220	45,490
Total	$ 1,335,566	$ 1,460,083

Amount of cash subject to withdrawal restrictions, restricted deposits held as compensating balances, and cash and securities segregated in compliance with regulations (such as cash deposited in a special reserve account for the exclusive benefit of customers).

No definition available.

Name:	us-gaap_CashAndSecuritiesSegregatedUnderFederalAndOtherRegulations
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant