Derivative Financial Instruments (Tables)

6 Months Ended

Mar. 31, 2020

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, 2020 and September 30, 2019:

	March 31, 2020
	Contract Amount				Fair Value
	Foreign Currency		USD		USD
	(In thousands)
Sell foreign currency:
Euro (EUR)	EUR	10,000	$	11,004	$	—
Buy foreign currency:
British pound (GBP)	GBP	21,781	$	27,000	$	—
Singapore dollar (SGD)	SGD	10,274	$	7,200	$	—

	September 30, 2019
	Contract Amount				Fair Value
	Foreign Currency		USD		USD
	(In thousands)
Sell foreign currency:
Euro (EUR)	EUR	10,800	$	11,723	$	—
Buy foreign currency:
British pound (GBP)	GBP	5,200	$	6,400	$	—
Singapore dollar (SGD)	SGD	5,798	$	4,200	$	—

Losses on Derivative Financial Instruments

Gain (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,
	2020			2019		2020			2019
	(In thousands)
Gains (losses) on foreign currency forward contracts	$	(2,194	)	$	720	$	(1,049	)	$	316