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Fair Value Measurements (Tables)
 9 Months Ended
May 31, 2026
Fair Value Disclosures [Abstract]  
Schedule of Recurring Fair Value Measurements Recurring fair value measurements as of May 31, 2026, and August 31, 2025, are as follows:
May 31, 2026
Quoted Prices in
Active Markets
for Identical
Assets
(Level 1)		Significant
Other
Observable
Inputs
(Level 2)		Significant
Unobservable
Inputs
(Level 3)		Total
Assets(Dollars in thousands)
Commodity derivatives$1,810 $255,582 $— $257,392 
Foreign exchange derivatives— 67,830 — 67,830 
Segregated investments and marketable securities29,911 125,638 — 155,549 
Time deposits— 689 — 689 
Money market funds257,040 — — 257,040 
Other assets33,513 — — 33,513 
Total$322,274 $449,739 $— $772,013 
Liabilities    
Commodity derivatives$2,923 $527,038 $— $529,961 
Foreign exchange derivatives— 8,153 — 8,153 
Total$2,923 $535,191 $— $538,114 
August 31, 2025
Quoted Prices in
Active Markets
for Identical
Assets
(Level 1)		Significant
Other
Observable
Inputs
(Level 2)		Significant
Unobservable
Inputs
(Level 3)		Total
Assets(Dollars in thousands)
Commodity derivatives$3,153 $132,535 $— $135,688 
Foreign exchange derivatives— 43,527 — 43,527 
Segregated investments and marketable securities34,303 135,675 — 169,978 
Money market funds78,393 — — 78,393 
Other assets32,139 — — 32,139 
Total$147,988 $311,737 $— $459,725 
Liabilities
Commodity derivatives$1,110 $166,798 $— $167,908 
Foreign exchange derivatives— 11,771 — 11,771 
Total$1,110 $178,569 $— $179,679