Goodwill and Intangible Assets - Summary of Intangible Assets (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	May 31, 2020	Nov. 30, 2019
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Total gross costs - intangible assets	$ 261,162	$ 262,599
Total impairment losses	(446)
Accumulated amortization - finite lived intangible assets	(97,500)	(92,057)
Total net carrying amount - intangible assets	163,216	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	8,215	8,273
Impairment losses - indefinite lived intangible assets	(146)
Net carrying amount - indefinite lived intangible assets	8,069	8,273
Customer relationships
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Gross costs - finite lived intangible assets	125,125	125,736
Impairment losses - finite lived intangible assets	(26)
Accumulated amortization - finite lived intangible assets	(71,023)	(67,257)
Net carrying amount - finite lived intangible assets	$ 54,076	$ 58,479
Weighted average remaining lives (years)	9 years 7 months 6 days	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	$ 127,822	$ 128,590
Impairment losses - finite lived intangible assets	(274)
Accumulated amortization - finite lived intangible assets	(26,477)	(24,800)
Net carrying amount - finite lived intangible assets	$ 101,071	$ 103,790
Weighted average remaining lives (years)	27 years 9 months 18 days	28 years 3 months 18 days