Derivative Financial Instruments (Tables)

6 Months Ended

Mar. 31, 2022

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, 2022 and September 30, 2021:

	March 31, 2022
	Contract Amount				Fair Value
	Foreign Currency		USD		USD
	(In thousands)
Sell foreign currency:
Euro (EUR)	EUR	16,500	$	18,330	$	—
Buy foreign currency:
British pound (GBP)	GBP	9,223	$	12,100	$	—
Singapore dollar (SGD)	SGD	7,571	$	5,600	$	—

	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 (losses) on derivative financial instruments were 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,
	2022		2021		2022		2021
	(In thousands)
Gains (losses) on foreign currency forward contracts	$	(576)	$	1,229	$	(14)	$	2,915