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Related Party (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Schedule of Equity Method Investments [Line Items]
Product Sales to Related Party, Gross	$ 61,873	$ 55,185	$ 43,017
Operating And Administrative Services Revenue from Related Party	1,008	919	794
Due from (to) Related Party	$ 62	$ 756
Feeders Advantage [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment Ownership Percentage	50.00%

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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- Definition

Receivables to be collected from (obligations owed to) related parties, net as of the balance sheet date within one year where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth.

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