Goodwill and Intangible Assets - Summary of Intangible Assets (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Feb. 28, 2019	Nov. 30, 2018
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Table] [Line Items]
Goodwill	$ 1,645,435	$ 1,642,170
Total gross costs - intangible assets	263,640	262,446
Accumulated amortization - finite lived intangible assets	(83,330)	(79,978)
Total net carrying amount - intangible assets	180,310	182,468
Exchange and clearing organization membership interests and registrations
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Table] [Line Items]
Gross costs - indefinite lived intangible assets	8,591	8,524
Net carrying amount - indefinite lived intangible assets	8,591	8,524
Customer relationships
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Table] [Line Items]
Gross costs - finite lived intangible assets	126,039	125,574
Accumulated amortization - finite lived intangible assets	(61,214)	(58,892)
Net carrying amount - finite lived intangible assets	$ 64,825	$ 66,682
Weighted average remaining lives (years)	10 years 5 months	10 years 7 months
Trade name
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Table] [Line Items]
Gross costs - finite lived intangible assets	$ 129,010	$ 128,348
Accumulated amortization - finite lived intangible assets	(22,116)	(21,086)
Net carrying amount - finite lived intangible assets	$ 106,894	$ 107,262
Weighted average remaining lives (years)	29 years	29 years 4 months