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Long-Term Debt (Components of Long-Term Debt) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Sep. 30, 2014
Debt Disclosure [Abstract]
Industrial development revenue bonds	$ 2,800us-gaap_LongTermDebt	$ 3,200us-gaap_LongTermDebt
Less current portion	(400)	(400)
Total long-term debt and capital lease obligations	$ 2,400	$ 2,800

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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