Derivative Financial Instruments (Tables)

3 Months Ended

Dec. 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 December 31, 2020 and September 30, 2020:

	December 31, 2020
	Contract Amount				Fair Value
	Foreign Currency		USD		USD
	(In thousands)
Sell foreign currency:
Euro (EUR)	EUR	18,900	$	23,068	$	—
Buy foreign currency:
British pound (GBP)	GBP	12,034	$	16,400	$	—
Singapore dollar (SGD)	SGD	6,725	$	5,100	$	—

	September 30, 2020
	Contract Amount				Fair Value
	Foreign Currency		USD		USD
	(In thousands)
Sell foreign currency:
Euro (EUR)	EUR	15,000	$	17,656	$	—
Buy foreign currency:
British pound (GBP)	GBP	16,555	$	21,300	$	—
Singapore dollar (SGD)	SGD	7,815	$	5,700	$	—

Losses on Derivative Financial Instruments

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 December 31,
	2020		2019
	(In thousands)
Gains on foreign currency forward contracts	$	1,686	$	1,145