Derivative Instruments - Notional Amounts Outstanding under Foreign Currency Contracts - Fair Value of Liabilities (Details) - Not Designated as Hedging Instrument - USD ($) $ in Thousands	Sep. 30, 2018	Sep. 30, 2017
Derivative [Line Items]
Fair Value of Liabilities	$ (177)	$ (146)
Foreign Exchange Contract
Derivative [Line Items]
Fair Value of Liabilities	$ (177)	$ (146)

Fair value portion of liability contracts related to the exchange of different currencies, including, but not limited to, foreign currency options, forward (delivery or nondelivery) contracts, and swaps entered into.

No definition available.

Name:	us-gaap_ForeignCurrencyContractsLiabilityFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant