Summary of Significant Accounting Policies Change in Accounting Estimate (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Change in Accounting Estimate [Line Items]
Losses on inventory purchase commitments	$ 0	$ 2,455	$ 0
Write-down of inventory	3,652	10,380	1,167
Inventory Valuation and Obsolescence
Change in Accounting Estimate [Line Items]
Losses on inventory purchase commitments		2,455
Decrease (Increase) In Operating Income (Loss) Including Portion Attributable To Noncontrolling Interest		12,835
Decrease (Increase) In Operating Income (Loss) Attributable To Parent	3,700	9,700
Earnings Per Share Basic And Diluted Increase (Decrease)	$ 0.39	$ 1.01
Write-down of inventory	$ 3,652	$ 10,380