Related Party Transactions - Jefferies Capital Partners Related Funds (Detail) - Equity Method Investee - Equity Investments in Jefferies Capital Partners Related Funds - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Aug. 31, 2018	Aug. 31, 2017	Aug. 31, 2018	Aug. 31, 2017	Nov. 30, 2017
Related Party Transaction [Line Items]
Equity investments loans in related funds	$ 34,100		$ 34,100		$ 23,700
Other revenues and investment income (loss)	172	$ (373)	10,175	$ (9,793)
Service charges	$ 92	$ 200	$ 212	$ 523

Reflects the sum of all other revenue and income realized from sales and other transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party during the period.

No definition available.

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Balance Type:	credit
Period Type:	duration