Fair Value Measurements (Tables)

12 Months Ended

Aug. 31, 2018

Fair Value Disclosures [Abstract]

Schedule of assets and liabilities recognized at fair value on a recurring basis

The following tables present assets and liabilities, included on our Consolidated Balance Sheets, that are recognized at fair value on a recurring basis, and indicate the fair value hierarchy utilized to determine these fair values. Assets and liabilities are classified, in their entirety, based on the lowest level of input that is a significant component of the fair value measurement. The lowest level of input is considered Level 3. Our assessment of the significance of a particular input to the fair value measurement requires judgment and may affect the classification of fair value assets and liabilities within the fair value hierarchy levels.

Recurring fair value measurements at August 31, 2018, and 2017, are as follows:

	2018
	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	$	54,487	$	259,359	$	—	$	313,846
Foreign currency derivatives	—		15,401		—		15,401
Deferred compensation assets	39,073		—		—		39,073
Embedded derivative asset	—		23,595		—		23,595
Other assets	5,334		—		—		5,334
Total	$	98,894	$	298,355	$	—	$	397,249
Liabilities:
Commodity derivatives	$	31,778	$	389,911	$	—	$	421,689
Foreign currency derivatives	—		24,701		—		24,701
Interest rate swap derivatives	—		9,452		—		9,452
Total	$	31,778	$	424,064	$	—	$	455,842

	2017 (As Restated)
	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	$	48,483	$	166,866	$	—	$	215,349
Foreign currency derivatives	—		8,779		—		8,779
Interest rate swap derivatives	—		9,978		—		9,978
Deferred compensation assets	52,414		—		—		52,414
Deferred purchase price receivable	—		—		548,602		548,602
Embedded derivative	—		25,533		—		25,533
Other assets	14,846		—		—		14,846
Total	$	115,743	$	211,156	$	548,602	$	875,501
Liabilities:
Commodity derivatives	$	31,190	$	262,140	$	—	$	293,330
Foreign currency derivatives	—		19,931		—		19,931
Interest rate swap derivatives	—		707		—		707
Total	$	31,190	$	282,778	$	—	$	313,968