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Fair Value Measurements (Tables)
6 Months Ended
Feb. 28, 2021
Fair Value Disclosures [Abstract]  
Fair Value Measurements, Recurring and Nonrecurring
February 28, 2021
Quoted Prices in
Active Markets
for Identical
Assets
(Level 1)
Significant
Other
Observable
Inputs
(Level 2)
Significant
Unobservable
Inputs
(Level 3)
Total
(Dollars in thousands)
Assets    
Commodity derivatives$1,856 $989,293 $— $991,149 
Foreign exchange derivatives— 7,302 — 7,302 
Deferred compensation assets49,314 — — 49,314 
Embedded derivative asset— 15,865 — 15,865 
Segregated investments and marketable securities185,224 — — 185,224 
Other assets5,991 — — 5,991 
Total$242,385 $1,012,460 $— $1,254,845 
Liabilities    
Commodity derivatives$4,409 $511,748 $— $516,157 
Foreign exchange derivatives— 64,669 — 64,669 
Total$4,409 $576,417 $— $580,826 
August 31, 2020
Quoted Prices in
Active Markets
for Identical
Assets
(Level 1)
Significant
Other
Observable
Inputs
(Level 2)
Significant
Unobservable
Inputs
(Level 3)
Total
(Dollars in thousands)
Assets
Commodity derivatives$5,762 $355,783 $— $361,545 
Foreign exchange derivatives— 11,523 — 11,523 
Deferred compensation assets47,669 — — 47,669 
Embedded derivative asset— 18,998 — 18,998 
Segregated investments and marketable securities85,950 — — 85,950 
Other assets5,276 — — 5,276 
Total$144,657 $386,304 $— $530,961 
Liabilities
Commodity derivatives$6,037 $346,126 $— $352,163 
Foreign exchange derivatives— 69,467 — 69,467 
Total$6,037 $415,593 $— $421,630