Valuation and Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Inventory Obsolescence Reserve
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	$ 9,324	$ 9,552	$ 6,645
Charged to Costs And Expenses	187	1,793	4,608
Charged to Other Assets
(Deductions) And Additions	(2,579)	(2,021)	(1,701)
Balance at End of Period	6,932	9,324	9,552
Allowance for Doubtful Accounts on Accounts and Notes Receivable
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	280	411	334
Charged to Costs And Expenses	457	118	128
Charged to Other Assets
(Deductions) And Additions	(361)	(249)	(51)
Balance at End of Period	$ 376	$ 280	$ 411