Accumulated Other Comprehensive Income (Summary of Changes in AOCI) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	May. 31, 2015	May. 31, 2014	May. 31, 2015	May. 31, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			$ 86,962
Other comprehensive (loss) income before reclassifications			(101,826)
Amounts reclassified from AOCI			5,620
Other comprehensive (loss) income	$ (8,666)	$ (6,830)	(96,206)	$ 6,493
Ending balance	(9,244)		(9,244)
Foreign currency translation adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			123,411
Other comprehensive (loss) income before reclassifications			(94,693)
Other comprehensive (loss) income			(94,693)
Ending balance	28,718		28,718
Derivative instruments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			4,572
Other comprehensive (loss) income before reclassifications			(7,711)
Amounts reclassified from AOCI			5,620
Other comprehensive (loss) income			(2,091)
Ending balance	2,481		2,481
Actuarial loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			(40,704)
Ending balance	(40,704)		(40,704)
Prior service cost
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			1,196
Ending balance	1,196		1,196
Unrealized gain (loss) on available for sale securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			(1,513)
Other comprehensive (loss) income before reclassifications			578
Other comprehensive (loss) income			578
Ending balance	$ (935)		$ (935)