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Derivative Instruments and Hedging Activities (Narrative) (Details) ¥ in Thousands, $ in Thousands | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2016 USD ($) | Mar. 31, 2015 USD ($) | Mar. 31, 2016 USD ($) | Mar. 31, 2015 USD ($) | Mar. 31, 2016 CNY (¥) | Mar. 31, 2016 USD ($) | Sep. 30, 2015 USD ($)
Net unrecognized losses on terminated derivative instruments expected to be reclassified to earnings |  |  | $ 72 |  |  |  |
Term of gain or loss recognition in interest expense on terminated derivatives recorded in OCI |  |  | 12 months |  |  |  |
Unrealized gain (loss) on foreign currency transaction designated as a hedge of a net investment in a foreign subsidiary | $ (345) | $ 0 | $ 517 | $ 0 |  |  |
Intercompany Loan [Member] |  |  |  |  |  |  |
Unrealized gain (loss) on foreign currency transaction designated as a hedge of a net investment in a foreign subsidiary |  |  | 517 |  |  |  |
Value of Net Investment Hedging Instruments Used | ¥ |  |  |  |  | ¥ 160,000 |  |
Interest Expense [Member] | Derivatives in Cash Flow Hedging Relationships [Member] |  |  |  |  |  |  |
Amount of Gain/Loss Recognized in Accumulated OCI on Derivative | $ 0 | $ 0 | $ 0 | $ 0 |  |  |
Total Accumulated Other Comprehensive (Loss) Earnings [Member] |  |  |  |  |  |  |
Unrecognized gains (loss) |  |  |  |  |  | $ 326 | $ 269

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- Definition The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624171-113959 + Details
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- Definition Current period adjustment in other comprehensive income reflecting gains or losses on foreign currency transactions that are designated as, and are effective as, hedges of a net investment in a foreign entity, net of tax effect. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 20 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6915805&loc=d3e32211-110900 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624171-113959 + Details
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