Fair Value Measurements (Tables)

9 Months Ended

May 31, 2020

Fair Value Disclosures [Abstract]

Fair Value Measurements, Recurring and Nonrecurring

	May 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	$	43,785	$	373,033	$	—	$	416,818
Foreign exchange derivatives	—		13,733		—		13,733
Deferred compensation assets	44,668		—		—		44,668
Embedded derivative asset	—		18,636		—		18,636
Segregated investments	94,233		—		—		94,233
Other assets	5,478		—		—		5,478
Total	$	188,164	$	405,402	$	—	$	593,566
Liabilities
Commodity derivatives	$	89,891	$	208,559	$	—	$	298,450
Foreign exchange derivatives	—		92,962		—		92,962
Total	$	89,891	$	301,521	$	—	$	391,412

	August 31, 2019
	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	$	67,817	$	180,392	$	—	$	248,209
Foreign exchange derivatives	—		10,339		—		10,339
Interest rate swap derivatives	—		9,841		—		9,841
Deferred compensation assets	40,368		—		—		40,368
Embedded derivative asset	—		21,364		—		21,364
Segregated investments	77,777		—		—		77,777
Other assets	6,519		—		—		6,519
Total	$	192,481	$	221,936	$	—	$	414,417
Liabilities
Commodity derivatives	$	40,305	$	188,455	$	—	$	228,760
Foreign exchange derivatives	—		20,701		—		20,701
Total	$	40,305	$	209,156	$	—	$	249,461