Postretirement benefits

3 Months Ended

Mar. 31, 2021

Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]

Postretirement benefits

We have historically provided certain health care benefits for a large number of retired U.S. employees. In addition to our retiree health care plan, we also have a U.S. supplemental executive retirement plan. Further information regarding our postretirement benefit plans can be found under the caption “Note 14: Postretirement Benefits” in the Notes to Consolidated Financial Statements appearing in the 2020 Form 10-K.

Postretirement benefit income is included in other income on the consolidated statements of comprehensive income (loss) and consisted of the following components:

	Quarter Ended March 31,
(in thousands)	2021		2020
Interest cost	$	242	$	478
Expected return on plan assets	(1,875)		(1,905)
Amortization of prior service credit	(355)		(355)
Amortization of net actuarial losses	407		575
Net periodic benefit income	$	(1,581)	$	(1,207)