Derivative Financial Instruments (Tables)

9 Months Ended

Jun. 30, 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 June 30, 2015 and September 30, 2014:

	June 30, 2015
	Contract Amount				Fair Value
	Foreign Currency		US$		US$
	(In thousands)
Sell foreign currency:
Canadian dollar (CAD)	CAD	4,000	$	3,208	$	—
Euro (EUR)	EUR	6,600	$	7,389	$	—
Buy foreign currency:
British pound (GBP)	GBP	4,397	$	6,900	$	—

	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 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 June 30,				Nine Months Ended June 30,
	2015		2014		2015		2014
	(In thousands)
Gains on foreign currency forward contracts	$	548	$	318	$	209	$	850