Goodwill and Intangible Assets - Summary of Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Nov. 30, 2018	Feb. 29, 2020	Nov. 30, 2019
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Total gross costs - intangible assets		$ 262,284	$ 262,599
Accumulated amortization - finite lived intangible assets		(94,928)	(92,057)
Total net carrying amount - intangible assets		167,356	170,542
Exchange and clearing organization membership interests and registrations
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Gross costs - indefinite lived intangible assets		8,269	8,273
Net carrying amount - indefinite lived intangible assets		8,269	8,273
Customer relationships
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Gross costs - finite lived intangible assets		125,604	125,736
Accumulated amortization - finite lived intangible assets		(69,246)	(67,257)
Net carrying amount - finite lived intangible assets		56,358	58,479
Weighted average remaining lives (years)	9 years 10 months 24 days
Trade name
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Gross costs - finite lived intangible assets		128,411	128,590
Accumulated amortization - finite lived intangible assets		(25,682)	(24,800)
Net carrying amount - finite lived intangible assets		$ 102,729	$ 103,790
Weighted average remaining lives (years)	28 years 3 months 18 days