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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
Feb. 28, 2018
Feb. 28, 2017
Nov. 30, 2017
Related Party Transaction [Line Items]      
Equity investments loans in related funds $ 30,900   $ 23,700
Other revenues and investment income (loss) 7,022 $ (1,298)  
Service charges $ 53 $ 125