Segment Information - Segment Concentration (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Aug. 31, 2014 customer	Aug. 31, 2013 customer	Aug. 31, 2012 customer
Segment Reporting Information [Line Items]
Number Of External Customers With More Than 10% of Consolidated Revenue	0	0	0
Revenues	$ 2,543,583	$ 2,621,911	$ 3,340,938
China
Segment Reporting Information [Line Items]
Revenues	390,634	562,558	719,979
Turkey
Segment Reporting Information [Line Items]
Revenues	261,558	341,418	435,558
KOREA, REPUBLIC OF
Segment Reporting Information [Line Items]
Revenues	$ 265,912		$ 397,525
Sales | China
Segment Reporting Information [Line Items]
Concentration Risk, Percentage	15.40%	21.50%	22.00%
Sales | Turkey
Segment Reporting Information [Line Items]
Concentration Risk, Percentage	10.30%	13.00%	13.00%
Sales | KOREA, REPUBLIC OF
Segment Reporting Information [Line Items]
Concentration Risk, Percentage	10.50%		12.00%