Derivative Financial Instruments (Tables)

6 Months Ended

Mar. 31, 2017

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Summary of Outstanding Foreign Currency Forward Contracts

The following tables summarize our outstanding foreign currency forward contracts, by currency, at March 31, 2017 and September 30, 2016:

	March 31, 2017
	Contract Amount				Fair Value
	Foreign Currency		US$		US$
	(In thousands)
Sell foreign currency:
Euro (EUR)	EUR	5,700	$	6,113	$	—
Buy foreign currency:
British pound (GBP)	GBP	4,479	$	5,600	$	—

	September 30, 2016
	Contract Amount				Fair Value
	Foreign Currency		US$		US$
	(In thousands)
Sell foreign currency:
Euro (EUR)	EUR	7,850	$	8,743	$	—
Buy foreign currency:
British pound (GBP)	GBP	7,721	$	10,000	$	—

Losses on Derivative Financial Instruments

osses) 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,
	2017		2016			2017			2016
	(In thousands)
Gains (losses) on foreign currency forward contracts	$	55	$	(956	)	$	(505	)	$	(1,255	)