Components of Accumulated Other Comprehensive Loss, Net of Tax (Detail) $ in Thousands	3 Months Ended
	Nov. 30, 2016 USD ($)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ 874,311
Other comprehensive loss before reclassifications	(11,625)
Amounts reclassified from accumulated other comprehensive loss	323
Ending balance	880,725
Unrealized (Gain) Loss on Derivative Financial Instruments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(5,492)
Other comprehensive loss before reclassifications	(4,904)
Amounts reclassified from accumulated other comprehensive loss	323
Ending balance	(10,073)
Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(20,832)
Other comprehensive loss before reclassifications	(6,720)
Ending balance	(27,552)
Other
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(429)
Other comprehensive loss before reclassifications	(1)
Ending balance	(430)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(26,753)
Ending balance	$ (38,055)