Net Periodic Benefit Cost (Tables)

3 Months Ended

Mar. 31, 2021

Retirement Benefits [Abstract]

Net periodic benefit cost

Net periodic pension cost for the Company’s defined benefit pension plans and U.S. post-retirement medical plan includes the following components for the three months ended March 31:

	U.S. Pension Benefits				Non-U.S. Pension Benefits				Other U.S. Post-retirement Benefits				Total
	2021		2020		2021		2020		2021		2020		2021		2020
Service cost, net	$	374	$	326	$	4,945	$	4,517	$	—	$	—	$	5,319	$	4,843
Interest cost on projected benefit obligations	548		889		850		1,180		2		6		1,400		2,075
Expected return on plan assets	(1,494)		(1,524)		(8,972)		(8,085)		—		—		(10,466)		(9,609)
Recognition of prior service cost	—		—		(471)		(1,725)		—		—		(471)		(1,725)
Recognition of actuarial losses/(gains)	729		644		6,299		5,654		(28)		(26)		7,000		6,272
Net periodic pension cost/(credit)	$	157	$	335	$	2,651	$	1,541	$	(26)	$	(20)	$	2,782	$	1,856