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Goodwill and Intangible Assets - Summary of Intangible Assets (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Feb. 29, 2024
May 31, 2025
Nov. 30, 2024
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]      
Assets Acquired - finite-lived intangible assets   $ 721 $ 61,299
Impairment losses - indefinite lived intangible assets     (10)
Accumulated amortization - finite lived intangible assets   (203,015) (176,644)
Total gross costs - intangible assets   420,199 341,726
Total net carrying amount - intangible assets   217,905 226,371
OpNet      
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]      
Intangible assets increase (decrease) $ 39,300    
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   8,793 8,715
Assets Acquired - indefinite-lived intangible assets   0 0
Impairment losses - indefinite lived intangible assets     (10)
Net carrying amount - indefinite lived intangible assets   8,793 8,705
Customer relationships      
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]      
Gross costs - finite lived intangible assets   165,820 136,049
Assets Acquired - finite-lived intangible assets   622 26,450
Impairment losses - indefinite lived intangible assets     0
Accumulated amortization - finite lived intangible assets   (111,235) (104,539)
Net carrying amount - finite lived intangible assets   $ 55,207 $ 57,960
Weighted Average Remaining Lives (Years)   5 years 2 months 12 days 5 years 7 months 6 days
Trademarks and trade names      
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]      
Gross costs - finite lived intangible assets   $ 160,291 $ 146,032
Assets Acquired - finite-lived intangible assets   0 8,533
Impairment losses - indefinite lived intangible assets     0
Accumulated amortization - finite lived intangible assets   (52,338) (45,412)
Net carrying amount - finite lived intangible assets   $ 107,953 $ 109,153
Weighted Average Remaining Lives (Years)   21 years 21 years 4 months 24 days
Other      
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]      
Gross costs - finite lived intangible assets   $ 85,295 $ 50,930
Assets Acquired - finite-lived intangible assets   99 26,316
Impairment losses - indefinite lived intangible assets     0
Accumulated amortization - finite lived intangible assets   (39,442) (26,693)
Net carrying amount - finite lived intangible assets   $ 45,952 $ 50,553
Weighted Average Remaining Lives (Years)   3 years 7 months 6 days 3 years 10 months 24 days