Income Taxes (Narrative) (Details) (USD $)	12 Months Ended
	Aug. 31, 2014	Aug. 31, 2013	Aug. 31, 2012
Income Taxes [Line Items]
Net tax benefit from claiming additional foreign tax credits	$ 4,200,000	$ 2,400,000
Total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate	2,500,000	3,100,000
Net operating loss carryforward included in the gross unrecognized tax benefit	3,000,000
Increase (decrease) in income tax expense due to interest and penalties related to uncertain tax positions		100,000	100,000
Balance of interest and penalties related to uncertain tax positions	300,000	300,000
Additional Paid-in Capital [Member]
Income Taxes [Line Items]
Reduction of income tax expense in additional paid in capital	$ 2,477,000	$ 903,000