Segment Information - Reconciliation of Earnings from Operations to Earnings Before Income Tax and Earnings (Loss) from Unconsolidated Affiliates (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Feb. 29, 2020	Feb. 28, 2019	Feb. 29, 2020	Feb. 28, 2019
Segment Reporting [Abstract]
Earnings from operations	$ 38,436	$ 18,054	$ 80,220	$ 54,508
Interest and foreign exchange	12,609	9,237	25,461	13,641
Earnings before income tax and earnings (loss) from unconsolidated affiliates	$ 25,827	$ 8,817	$ 54,759	$ 40,867

Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(h)(1)(i))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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Period Type:	duration