Related Party Transactions - Summary of Interest Income, Other Revenues and Investment Income to Private Equity Related Funds (Detail) - Private Equity Related Funds [Member] - Affiliated Entity [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Aug. 31, 2016	Aug. 31, 2015	Aug. 31, 2016	Aug. 31, 2015
Related Party Transaction [Line Items]
Other revenues and investment income (loss)	$ 6,048	$ (3,495)	$ (1,664)	$ (27,707)
Service charges	$ 201	$ 630	$ 537	$ 1,089