Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive Loss, Net of Tax (Detail) $ in Thousands	6 Months Ended
	Feb. 29, 2020 USD ($)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ 1,276,730
Ending balance	1,286,472
Unrealized Gain (Loss) on Derivative Financial Instruments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(8,841)
Other comprehensive loss before reclassifications	(1,484)
Amounts reclassified from Accumulated other comprehensive loss	477
Ending balance	(9,848)
Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(34,194)
Other comprehensive loss before reclassifications	(2,278)
Ending balance	(36,472)
Other
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(1,780)
Other comprehensive loss before reclassifications	(221)
Ending balance	(2,001)
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(44,815)
Other comprehensive loss before reclassifications	(3,983)
Amounts reclassified from Accumulated other comprehensive loss	477
Ending balance	$ (48,321)