Derivative Financial Instruments Derivative Instruments in Statement of Financial Position and Statement of Financial Performance, Fair Values (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Aug. 31, 2014	Aug. 31, 2014 Foreign currency exchange forward contracts Cash Flow Hedging	Aug. 31, 2014 Prepaid expenses and other current assets Foreign currency exchange forward contracts Not designated as hedging instruments	Aug. 31, 2013 Prepaid expenses and other current assets Foreign currency exchange forward contracts Not designated as hedging instruments	Aug. 31, 2014 Other accrued liabilities Foreign currency exchange forward contracts Not designated as hedging instruments	Aug. 31, 2013 Other accrued liabilities Foreign currency exchange forward contracts Not designated as hedging instruments
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset			$ 202	$ 0
Derivative Liability, Fair Value, Gross Liability					46	0
Derivative Gain (Loss) Recognized in Other Comprehensive Income		325
Derivative Gain (Loss) Recognized in Revenues - Effective Portion		249
Derivative Gain (Loss) Recognized in Other Income (Expense), net - designated as cash flow hedges		112
Derivative Gain (Loss) Recognized in Other Income (Expense), net - not designated as cash flow hedges	$ (12)