Goodwill and Other Intangible Assets - Schedule of Goodwill Resulting from Leucadia Transaction Attributable to Reportable Segments (Detail) $ in Thousands	6 Months Ended
	May. 31, 2015 USD ($)
Goodwill [Roll Forward]
Total goodwill	$ 1,662,636
Add: Translation adjustments	(2,443)
Total goodwill	1,660,193
Capital Markets [Member]
Goodwill [Roll Forward]
Total goodwill	1,659,636
Total goodwill	1,657,193
Asset Management [Member]
Goodwill [Roll Forward]
Total goodwill	3,000
Total goodwill	$ 3,000