Segment Reporting - Net Revenues by Geographic Region (Detail) - USD ($) $ in Thousands	3 Months Ended
Feb. 29, 2016	Feb. 28, 2015
Revenues:
Net revenues	$ 298,987	$ 591,672
Americas [Member]
Revenues:
Net revenues	187,709	436,786
Europe [Member]
Revenues:
Net revenues	96,433	139,206
Asia [Member]
Revenues:
Net revenues	$ 14,845	$ 15,680

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income after deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration