Pension and Postretirement Benefit Obligations (Tables)

9 Months Ended

Sep. 27, 2020

Retirement Benefits [Abstract]

Components of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost

The components of net periodic pension cost were as follows:

	Third Quarter				First Nine Months
(in thousands)	2020		2019		2020		2019
Service cost	$	1,659	$	1,207	$	4,976	$	3,620
Interest cost	2,760		3,063		8,280		9,188
Expected return on plan assets	(3,382)		(2,574)		(10,148)		(7,722)
Recognized net actuarial loss	1,189		901		3,568		2,702
Amortization of prior service cost	5		5		14		17
Net periodic pension cost	$	2,231	$	2,602	$	6,690	$	7,805

The components of net periodic postretirement benefit cost were as follows:

	Third Quarter				First Nine Months
(in thousands)	2020		2019		2020		2019
Service cost	$	376	$	389	$	1,128	$	1,167
Interest cost	504		694		1,511		2,080
Recognized net actuarial loss	88		196		263		587
Amortization of prior service cost	—		(324)		—		(970)
Net periodic postretirement benefit cost	$	968	$	955	$	2,902	$	2,864