Accumulated Other Comprehensive Income (Summary of Changes in AOCI) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Feb. 29, 2016	Feb. 28, 2015	Feb. 29, 2016	Feb. 28, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			$ (50,854)
Other comprehensive (loss) income before reclassifications			(41,107)
Amounts reclassified from AOCI			22,950
Other comprehensive (loss) income	$ (9,479)	$ (50,288)	(18,157)	$ (87,540)
Ending balance	(69,011)		(69,011)
Foreign currency translation adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			6,666
Other comprehensive (loss) income before reclassifications			(24,167)
Other comprehensive (loss) income			(24,167)
Ending balance	(17,501)		(17,501)
Derivative instruments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			(12,033)
Other comprehensive (loss) income before reclassifications			(13,813)
Amounts reclassified from AOCI			22,950
Other comprehensive (loss) income			9,137
Ending balance	(2,896)		(2,896)
Actuarial loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			(30,624)
Ending balance	(30,624)		(30,624)
Prior service cost
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			1,054
Ending balance	1,054		1,054
Unrealized (loss) gain on available for sale securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			(15,917)
Other comprehensive (loss) income before reclassifications			(3,127)
Other comprehensive (loss) income			(3,127)
Ending balance	$ (19,044)		$ (19,044)