Related Parties (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
May 31, 2014	May 31, 2013	May 31, 2014	May 31, 2013
Related Parties [Abstract]
Sales to Tractor Supply	$ 0.2	$ 0.3	$ 0.6	$ 0.6
Accounts receivable from Tractor Supply	$ 0.1		$ 0.1

Amount of receivables arising from transactions with related parties due within one year or the normal operating cycle, if longer.

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Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

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