Goodwill and Other Intangible Assets - Schedule of Goodwill Resulting from Leucadia Transaction Attributable to Reportable Segments (Detail) $ in Thousands	6 Months Ended
	May 31, 2016 USD ($)
Goodwill [Roll Forward]
Goodwill, Beginning Balance	$ 1,656,588
Translation adjustments	(3,321)
Goodwill, Ending Balance	1,653,267
Capital Markets [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	1,653,588
Goodwill, Ending Balance	1,650,267
Asset Management Income [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	3,000
Goodwill, Ending Balance	$ 3,000