Foreign Currency Forward Contracts (Details) - Selling, General and Administrative Expenses - Not Designated as Hedging Instrument - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Foreign currency balance sheet hedging
Foreign currency net gain (loss)	$ (290)	$ 79	$ (342)	$ 79
Foreign Currency Transaction
Foreign currency balance sheet hedging
Foreign currency net gain (loss)	479	899	726	899
Foreign Exchange Forward
Foreign currency balance sheet hedging
Foreign currency net gain (loss)	$ (769)	$ (820)	$ (1,068)	$ (820)

Amount before tax of foreign currency transaction realized gain (loss) recognized in the income statement.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 20
-Section 45
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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-URI http://asc.fasb.org/extlink&oid=109240200&loc=d3e30700-110894

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