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Company's Derivatives on Condensed Consolidated Financial statements of Operations (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Loss) Gain Recognized in Income	$ (58)	$ (148)	$ 155	$ (148)
Foreign Currency Forward Contracts \| Other Income (Expense)
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Loss) Gain Recognized in Income	$ (58)	$ (148)	$ 155	$ (148)

The amount of net gains and losses recognized in income during the period on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges, on derivative instruments designated and qualifying as hedging instruments in cash flow hedges, and on derivative instruments not designated as hedging instruments.

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