Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive Loss, Net of Tax (Detail) $ in Thousands	9 Months Ended
	May 31, 2020 USD ($)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ 1,276,730
Ending balance	1,291,221
Unrealized Gain (Loss) on Derivative Financial Instruments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(8,841)
Other comprehensive loss before reclassifications	(7,127)
Amounts reclassified from Accumulated other comprehensive loss	2,322
Ending balance	(13,646)
Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(34,194)
Other comprehensive loss before reclassifications	(13,306)
Ending balance	(47,500)
Other
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(1,780)
Other comprehensive loss before reclassifications	(140)
Ending balance	(1,920)
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(44,815)
Other comprehensive loss before reclassifications	(20,573)
Amounts reclassified from Accumulated other comprehensive loss	2,322
Ending balance	$ (63,066)