Collateralized Transactions - Cash and Securities Segregated (Details) - USD ($) $ in Thousands	Feb. 28, 2025	Nov. 30, 2024
Investments, Debt and Equity Securities [Abstract]
Cash and securities segregated and on deposit for regulatory purposes or deposited with clearing and depository organizations	$ 1,665,894	$ 1,132,612

Cash and securities deposited in a special reserve account for the exclusive benefit of customers.

No definition available.

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