Derivative Financial Instruments (Tables)

3 Months Ended

Dec. 31, 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 December 31, 2016 and September 30, 2016:

	December 31, 2016
	Contract Amount				Fair Value
	Foreign Currency		US$		US$
	(In thousands)
Sell foreign currency:
Euro (EUR)	EUR	6,250	$	6,603	$	—
Buy foreign currency:
British pound (GBP)	GBP	3,451	$	4,250	$	—

	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	$	—

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

Losses on derivative financial instruments are recorded in our condensed consolidated statements of income and comprehensive income as a component of other expenses, net, and consisted of the following: 

	Quarter Ended December 31,
	2016		2015
	(In thousands)
Losses on foreign currency forward contracts	$	560	$	299