Derivative Financial Instruments (Tables)

3 Months Ended

Dec. 31, 2021

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, 2021 and September 30, 2021:

	December 31, 2021
	Contract Amount				Fair Value
	Foreign Currency		USD		USD
	(In thousands)
Sell foreign currency:
Euro (EUR)	EUR	15,900	$	18,044	$	—
Buy foreign currency:
British pound (GBP)	GBP	10,983	$	14,800	$	—
Singapore dollar (SGD)	SGD	7,405	$	5,500	$	—

	September 30, 2021
	Contract Amount				Fair Value
	Foreign Currency		USD		USD
	(In thousands)
Sell foreign currency:
Euro (EUR)	EUR	17,100	$	19,829	$	—
Buy foreign currency:
British pound (GBP)	GBP	11,467	$	15,400	$	—
Singapore dollar (SGD)	SGD	6,650	$	4,900	$	—

Losses on Derivative Financial Instruments

Gains on derivative financial instruments were 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 December 31,
	2021		2020
	(In thousands)
Gains on foreign currency forward contracts	$	562	$	1,686