Derivative Instruments - Summary of Fair Values (Details) - Cash flow hedging - Designated as hedging instrument - USD ($) $ in Thousands	Feb. 28, 2021	Aug. 31, 2020
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Assets	$ 3,169	$ 3,644
Derivative Liabilities	3,711	5,773
Foreign currency forward contracts | Prepaid expenses and other current assets
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Assets	3,169	3,644
Foreign currency forward contracts | Accounts payable and accrued expenses
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Liabilities	378	93
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 | Other 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	1,889	1,861
Interest rate swap agreement | Other non-current liabilities
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Liabilities	$ 1,444	$ 3,819