Company's Derivatives on Consolidated Financial Statements of Operations (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Derivative Instruments Gain Loss [Line Items]
Amount of (Loss) Gain Recognized in Income	$ 2,439	$ 398	$ (394)
Foreign Currency Forward Contract | Other Income (Expense)
Derivative Instruments Gain Loss [Line Items]
Amount of (Loss) Gain Recognized in Income	$ 2,439	$ 398	$ (394)