Derivative Financial Instruments (Tables)

9 Months Ended

Jun. 30, 2016

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, 2016 and September 30, 2015:

	June 30, 2016
	Contract Amount				Fair Value
	Foreign Currency		US$		US$
	(In thousands)
Sell foreign currency:
Canadian dollar (CAD)	CAD	1,000	$	774	$	—
Euro (EUR)	EUR	4,850	$	5,387	$	—
Buy foreign currency:
British pound (GBP)	GBP	4,580	$	6,150	$	—

	September 30, 2015
	Contract Amount				Fair Value
	Foreign Currency		US$		US$
	(In thousands)
Sell foreign currency:
Canadian dollar (CAD)	CAD	2,750	$	2,045	$	—
Euro (EUR)	EUR	5,600	$	6,296	$	—
Buy foreign currency:
British pound (GBP)	GBP	6,943	$	10,550	$	—

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, net, and consisted of the following: 

	Quarter Ended June 30,					Nine Months Ended June 30,
	2016			2015		2016			2015
	(In thousands)
Gains (losses) on foreign currency forward contracts	$	(1,018	)	$	548	$	(2,273	)	$	209