Pension and Postretirement Benefit Obligations (Tables)

6 Months Ended

Jun. 28, 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:

	Second Quarter				First Half
(in thousands)	2020		2019		2020		2019
Service cost	$	1,658	$	1,206	$	3,317	$	2,413
Interest cost	2,760		3,062		5,520		6,125
Expected return on plan assets	(3,383)		(2,574)		(6,766)		(5,148)
Recognized net actuarial loss	1,190		900		2,379		1,801
Amortization of prior service cost	4		7		9		12
Net periodic pension cost	$	2,229	$	2,601	$	4,459	$	5,203

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

	Second Quarter				First Half
(in thousands)	2020		2019		2020		2019
Service cost	$	376	$	389	$	752	$	778
Interest cost	504		693		1,007		1,386
Recognized net actuarial loss	87		195		175		391
Amortization of prior service cost	—		(322)		—		(646)
Net periodic postretirement benefit cost	$	967	$	955	$	1,934	$	1,909