Summary of Significant Accounting Policies (Warranty) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Movement in Standard Product Warranty Accrual [Roll Forward]
Beginning balance	$ 1,454	$ 2,687	$ 2,265
Warranty expenditures	(819)	(1,360)	(1,831)
Reserve provision/(adjustment)	(7)	127	2,253
Ending balance	$ 628	$ 1,454	$ 2,687
Minimum
Product Warranty [Line Items]
Standard product warranty, period	12 months
Maximum
Product Warranty [Line Items]
Standard product warranty, period	24 months