Income Taxes (Schedule of Valuation Allowance) (Details) - Valuation Allowance of Deferred Tax Assets - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Valuation Allowance [Line Items]
Beginning balance	$ 10,056	$ 903	$ 135
Charged to cost and expenses	(1,934)	10,048	80
Charged to other accounts	317	(895)	688
Ending balance	$ 8,439	$ 10,056	$ 903