Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	$ 1,125
Balance at Beginning of Period	7,764
Charged to Costs And Expenses	2,147	$ 833	$ 457
Inventory obsolescence expense	3,887	2,617	187
Balance at End of Period	2,516	1,125
Balance at End of Period	6,675	7,764
Inventory Obsolescence Reserve
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	7,764	6,932	9,324
Inventory obsolescence expense	3,887	2,617	187
(Deductions) And Additions	(4,976)	(1,785)	(2,579)
Balance at End of Period	6,675	7,764	6,932
Allowance for Doubtful Accounts on Accounts and Notes Receivable
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	1,125	376	280
Charged to Costs And Expenses	2,147	833	457
(Deductions) And Additions	(756)	(84)	(361)
Balance at End of Period	$ 2,516	$ 1,125	$ 376