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Description of Business and Basis of Presentation (Details) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2017 USD ($) revenue_category | Sep. 30, 2016 USD ($) | Sep. 30, 2015 USD ($)
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |
Revenue, Net | $ 1,164,039 | $ 1,140,533 | $ 1,255,242
Number of Cost of Revenue Categories | revenue_category | 3 |  |
Out of Period Correction [Member] | Restatement Adjustment [Member] |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |
Revenue, Net |  |  | $ 6,400

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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + 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 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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