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Collateralized Transactions - Cash and Securities Segregated (Details) - USD ($) $ in Thousands	Aug. 31, 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	$ 1,111,620	$ 1,132,612

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- Definition

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

+ References

No definition available.

+ Details

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

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- References

No definition available.

+ Details

Name:	us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration