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Derivative Financial Instruments Derivative Financial Instruments (Derivative Instruments at Fair Value) (Details) - USD ($) $ in Thousands | Sep. 30, 2016 | Sep. 30, 2015
--- | --- | ---
Other Current Assets [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Foreign Currency Cash Flow Hedge Asset at Fair Value | $ 44 | $ 0
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value | 216 | 507
Other Current Liabilities [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Foreign Currency Cash Flow Hedge Liability at Fair Value | 1,477 | 0
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value | $ 1,693 | $ 46

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- Definition Fair value as of the balance sheet date of all foreign currency derivative assets designated as cash flow hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624163-113959 + Details
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