Derivative Financial Instruments (Tables)

6 Months Ended

Mar. 31, 2015

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Notional Amounts of Outstanding Derivative Positions

The following tables summarize our outstanding foreign currency forward contracts, by currency, at March 31, 2015 and September 30, 2014:

	March 31, 2015
	Contract Amount				Fair Value
	Foreign Currency		US$		US$
	(In thousands)
Sell foreign currency:
Canadian dollar (CAD)	CAD	7,550	$	5,923	$	—
Euro (EUR)	EUR	6,050	$	6,508	$	—
Buy foreign currency:
British pound (GBP)	GBP	6,366	$	9,400	$	—

	September 30, 2014
	Contract Amount				Fair Value
	Foreign Currency		US$		US$
	(In thousands)
Sell foreign currency:
Canadian dollar (CAD)	CAD	3,300	$	2,960	$	—
Euro (EUR)	EUR	3,800	$	4,790	$	—
Buy foreign currency:
British pound (GBP)	GBP	6,795	$	11,000	$	—

Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance

Gains (losses) on derivative financial instruments are recorded in our condensed consolidated statements of income and comprehensive income as a component of other income (expense), net, and consisted of the following:

	Quarter Ended March 31,					Six Months Ended March 31,
	2015			2014		2015			2014
	(In thousands)
Gains (losses) on Foreign currency forward contracts	$	(10	)	$	194	$	(339	)	$	532