Non-operating (loss) income

9 Months Ended

Sep. 30, 2021

Non-operating (loss) income, net [Abstract]

Other Income and Other Expense Disclosure

Non-operating Income (Loss), Net

The following table presents the components of Non-operating income (loss), net:

	Three Months Ended September 30,				Nine Months Ended  September 30,
	2021		2020		2021		2020
	(In thousands)
Interest income	$	111	$	805	$	438	$	7,500
Loss on extinguishment of debt	—		—		(2,149)		—
Gain on sale of business	—		(9)		—		5,602
Transition services income	—		—		—		2,100
Other, net	53		(21)		278		60
Total non-operating income (loss), net	$	164	$	775	$	(1,433)	$	15,262

The lower interest income during the three and nine months ended September 30, 2021 reflects a decline in interest rates on our investments in debt securities. The gain on sale of business in 2020 represents the excess of the contingent consideration received related to the divested security services business compared to the estimated receivable. The transition services income in 2020 relates to the divested security services business. The transition services agreement ended in February 2020.