Goodwill and Other Intangible Assets - Schedule of Goodwill Resulting from Leucadia Transaction Attributable to Reportable Segments (Detail) - USD ($) $ in Thousands	12 Months Ended
	Nov. 30, 2015	Nov. 30, 2014
Goodwill [Roll Forward]
Total goodwill	$ 1,662,636	$ 1,722,346
Impairment loss	0	(54,000)
Translation adjustments	(4,089)	(5,710)
Total goodwill	1,656,588	1,662,636
Capital Markets [Member]
Goodwill [Roll Forward]
Total goodwill	1,659,636
Total goodwill	1,653,588	1,659,636
Asset Management [Member]
Goodwill [Roll Forward]
Total goodwill	3,000
Total goodwill	3,000	3,000
Futures Reporting Unit [Member]
Goodwill [Roll Forward]
Impairment loss		(51,900)
International Asset Management Reporting Unit [Member]
Goodwill [Roll Forward]
Impairment loss		(2,100)
Leucadia [Member]
Goodwill [Roll Forward]
Purchase accounting adjustment	$ (1,959)	$ 0