Income Taxes (Narrative) (Details) (USD $) In Millions, unless otherwise specified	May 31, 2014	Aug. 31, 2013
Income Tax Disclosure [Abstract]
Deferred tax assets, valuation allowance	$ 1.4	$ 1.6
Unrecognized tax benefits	1.7
Unrecognized tax benefits that would have an impact on effective tax rate	2.3
Unrecognized tax benefits, income tax penalties and interest accrued	$ 1.5

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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-Name Accounting Standards Codification

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Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Unrecognized Tax Benefit

-URI http://asc.fasb.org/extlink&oid=6527854

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Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

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