Goodwill and Other Intangible Assets - Summary of Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Feb. 28, 2015	Feb. 28, 2014	Nov. 30, 2014
Finite And Infinite Lived Intangible Assets [Line Items]
Total gross costs - intangible assets	$ 274,451		$ 274,860
Accumulated amortization - finite lived intangible assets	(36,082)		(33,079)
Total net carrying amount - intangible assets	238,369		241,781
Customer relationships [Member]
Finite And Infinite Lived Intangible Assets [Line Items]
Gross costs - finite lived intangible assets	128,171		128,323
Accumulated amortization - finite lived intangible assets	(28,552)		(26,402)
Net carrying amount - finite lived intangible assets	99,619		101,921
Weighted average remaining lives (years)	13 years 6 months	13 years 8 months 12 days
Trade name [Member]
Finite And Infinite Lived Intangible Assets [Line Items]
Gross costs - finite lived intangible assets	131,779		132,009
Accumulated amortization - finite lived intangible assets	(7,530)		(6,677)
Net carrying amount - finite lived intangible assets	124,249		125,332
Weighted average remaining lives (years)	33 years	33 years 3 months 18 days
Exchange and clearing organization membership interests and registrations [Member]
Finite And Infinite Lived Intangible Assets [Line Items]
Gross costs - indefinite lived intangible assets	14,501		14,528
Accumulated amortization - finite lived intangible assets	0		0
Net carrying amount - indefinite lived intangible assets	$ 14,501		$ 14,528