Goodwill and Other Intangible Assets - Summary of Intangible Assets (Detail) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	May 31, 2017	Nov. 30, 2016
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Table] [Line Items]
Total gross costs - intangible assets	$ 263,530	$ 262,474
Impairment of intangible assets	(357)
Accumulated amortization - finite lived intangible assets	(62,196)	(56,003)
Total net carrying amount - intangible assets	200,977	206,471
Customer Relationships [Member]
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Table] [Line Items]
Gross costs - finite lived intangible assets	125,865	125,381
Accumulated amortization - finite lived intangible assets	(46,587)	(42,283)
Net carrying amount - finite lived intangible assets	$ 79,278	$ 83,098
Weighted average remaining lives (years)	11 years 8 months	12 years 1 month
Trade Name [Member]
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Table] [Line Items]
Gross costs - finite lived intangible assets	$ 128,542	$ 128,052
Accumulated amortization - finite lived intangible assets	(15,609)	(13,720)
Net carrying amount - finite lived intangible assets	$ 112,933	$ 114,332
Weighted average remaining lives (years)	30 years 9 months	31 years 4 months
Exchange And Clearing Organization Membership Interests And Registrations [Member]
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Table] [Line Items]
Gross costs - indefinite lived intangible assets	$ 9,123	$ 9,041
Impairment of intangible assets	(357)
Net carrying amount - indefinite lived intangible assets	$ 8,766	$ 9,041