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Segment Information - Reconciliation of Earnings (Loss) from Operations to Earnings (Loss) Before Income Tax and Earnings from Unconsolidated Affiliates (Detail) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Apr. 30, 2021	May 31, 2021	May 31, 2020	May 31, 2021	May 31, 2020
Segment Reporting [Abstract]
Earnings (loss) from operations		$ 25,709	$ 66,812	$ (2,132)	$ 147,032
Interest and foreign exchange		10,204	7,562	30,875	33,023
Loss on extinguishment of debt	$ 4,800	4,763		4,763
Earnings (loss) before income tax and earnings from unconsolidated affiliates		$ 10,742	$ 59,250	$ (37,770)	$ 114,009

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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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