Derivative Instruments - Summary of Fair Values (Details) - Cash flow hedging - Designated as hedging instrument - USD ($) $ in Thousands	May 31, 2020	Aug. 31, 2019
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Assets	$ 418	$ 520
Derivative Liabilities	6,274	3,575
Foreign currency forward contracts | Prepaid expenses and other current assets
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Assets	418	520
Foreign currency forward contracts | Accounts payable and accrued expenses
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Liabilities	1,010	3,575
Interest rate swap agreement | Prepaid expenses and other current assets
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Assets	0	0
Interest rate swap agreement | Accounts payable and accrued expenses
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Liabilities	1,786	0
Interest rate swap agreement | Other non-current liabilities
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Liabilities	$ 3,478	$ 0