Fair Value Measurements (Tables)

6 Months Ended

Feb. 29, 2020

Fair Value Disclosures [Abstract]

Fair Value Measurements, Recurring and Nonrecurring

	February 29, 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	$	28,321	$	250,860	$	—	$	279,181
Foreign exchange derivatives	—		6,426		—		6,426
Interest rate swap derivatives	—		12,649		—		12,649
Deferred compensation assets	45,579		—		—		45,579
Embedded derivative asset	—		18,281		—		18,281
Segregated investments	78,816		—		—		78,816
Other assets	5,965		—		—		5,965
Total	$	158,681	$	288,216	$	—	$	446,897
Liabilities
Commodity derivatives	$	61,080	$	160,165	$	—	$	221,245
Foreign exchange derivatives	—		52,817		—		52,817
Total	$	61,080	$	212,982	$	—	$	274,062

	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