Derivative Instruments - Additional Information (Detail)	9 Months Ended
	May 31, 2020 USD ($)
Foreign Exchange Contracts
Derivative [Line Items]
Aggregate derivative notional amount	$ 37,300,000
Amount reclassified to revenue or cost of revenue in the next year	1,100,000
Interest rate swap contracts
Derivative [Line Items]
Unrealized pre-tax gain (loss) that would be reclassified to interest expense in the next year	5,000,000.0
Interest rate swap contracts | Derivatives maturing on September 2023
Derivative [Line Items]
Aggregate derivative notional amount	$ 106,600,000
Maturity date	2023-09
Interest rate swap contracts | Derivatives maturing on June 2024
Derivative [Line Items]
Aggregate derivative notional amount	$ 146,300,000
Maturity date	2024-06