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Summary of Significant Accounting Policies Change in Accounting Estimate (Details) (USD $) | 12 Months Ended
--- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2012
Change in Accounting Estimate [Line Items] |  |  |
Losses on inventory purchase commitments | $ 0 | $ 0 | $ 2,455,000
Write-down of inventory | 294,000 | 3,652,000 | 10,380,000
Inventory Valuation and Obsolescence |  |  |
Change in Accounting Estimate [Line Items] |  |  |
Losses on inventory purchase commitments |  |  | 2,455,000
Decrease (Increase) In Operating Income (Loss) Including Portion Attributable To Noncontrolling Interest |  |  | 12,800,000
Decrease (Increase) In Operating Income (Loss) Attributable To Parent |  | 3,700,000 | 9,700,000
Earnings Per Share Basic And Diluted Increase (Decrease) | $ 0.03 | $ 0.39 | $ 1.01
Write-down of inventory | $ 300,000 | $ 3,652,000 | $ 10,380,000

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- Definition Charge to cost of goods sold that represents the reduction of the carrying amount of inventory, generally attributable to obsolescence or market conditions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=28360613&loc=d3e4542-108314 + Details
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