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Goodwill and Intangible Assets - Summary of Intangible Assets (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Feb. 28, 2025
May 31, 2025
Feb. 28, 2026
Nov. 30, 2025
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]        
Total gross costs - intangible assets     $ 280,537 $ 422,534
Assets Acquired - finite-lived intangible assets   $ 721    
Accumulated amortization - finite lived intangible assets     (167,317) (220,678)
Total net carrying amount - intangible assets     113,220 202,577
Discontinued Operations, Held-for-Sale        
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]        
Intangible assets     82,700  
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     8,735 8,717
Assets Acquired - indefinite-lived intangible assets $ 0      
Net carrying amount - indefinite lived intangible assets     8,735 8,717
Customer relationships        
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]        
Gross costs - finite lived intangible assets     127,693 166,328
Assets Acquired - finite-lived intangible assets 622      
Accumulated amortization - finite lived intangible assets     (104,980) (116,810)
Net carrying amount - finite lived intangible assets     $ 22,713 $ 50,140
Weighted Average Remaining Lives (Years)     5 years 4 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     $ 128,981 $ 160,674
Assets Acquired - finite-lived intangible assets 0      
Accumulated amortization - finite lived intangible assets     (47,963) (55,948)
Net carrying amount - finite lived intangible assets     $ 81,018 $ 104,726
Weighted Average Remaining Lives (Years)     22 years 20 years 7 months 6 days
Other        
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]        
Gross costs - finite lived intangible assets     $ 15,128 $ 86,815
Assets Acquired - finite-lived intangible assets $ 99      
Accumulated amortization - finite lived intangible assets     (14,374) (47,920)
Net carrying amount - finite lived intangible assets     $ 754 $ 38,994
Weighted Average Remaining Lives (Years)     2 years 6 months 2 years 9 months 18 days