Components of Accumulated Other Comprehensive Income (Loss), Net of Tax (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	May 31, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ (6,369)
Year to date activity	(1,332)
Ending balance	(7,701)
Accumulated Unrealized Loss on Derivative Financial Instruments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(93)
Year to date activity	(1,607)
Ending balance	(1,700)
Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(5,951)
Year to date activity	270
Ending balance	(5,681)
Other Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(325)
Year to date activity	5
Ending balance	$ (320)