Goodwill and Other Intangible Assets - Summary of Intangible Assets (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Feb. 28, 2017	Nov. 30, 2016
Finite-Lived Intangible Assets [Line Items]
Total gross costs - intangible assets	$ 262,344	$ 262,474
Impairment of intangible assets	(357)
Accumulated amortization - finite lived intangible assets	(58,945)	(56,003)
Total net carrying amount - intangible assets	203,042	206,471
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross costs - finite lived intangible assets	125,357	125,381
Accumulated amortization - finite lived intangible assets	(44,325)	(42,283)
Net carrying amount - finite lived intangible assets	$ 81,032	$ 83,098
Weighted average remaining lives (years)	11 years 10 months 12 days	12 years 1 month
Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Gross costs - finite lived intangible assets	$ 127,928	$ 128,052
Accumulated amortization - finite lived intangible assets	(14,620)	(13,720)
Net carrying amount - finite lived intangible assets	$ 113,308	$ 114,332
Weighted average remaining lives (years)	31 years	31 years 4 months
Exchange and Clearing Organization Membership Interests and Registrations [Member]
Finite-Lived Intangible Assets [Line Items]
Gross costs - indefinite lived intangible assets	$ 9,059	$ 9,041
Impairment of intangible assets	(357)
Net carrying amount - indefinite lived intangible assets	$ 8,702	$ 9,041