Employee Benefit Plans (Tables)

3 Months Ended

Mar. 29, 2020

Retirement Benefits [Abstract]

Components of Net Periodic Benefit Costs

Components of net periodic benefit cost for the Company's defined benefit plans were as follows (in thousands):

	Three months ended
	March 29, 2020		March 31, 2019
Pension and SERPA Benefits:
Service cost	$	6,806	$	6,632
Interest cost	19,112		21,371
Expected return on plan assets	(33,764)		(35,581)
Amortization of unrecognized:
Prior service credit	(272)		(483)
Net loss	16,372		11,128
Net periodic benefit cost	$	8,254	$	3,067
Postretirement Healthcare Benefits:
Service cost	$	1,201	$	1,184
Interest cost	2,336		2,938
Expected return on plan assets	(3,467)		(3,507)
Amortization of unrecognized:
Prior service credit	(595)		(595)
Net loss	123		69
Net periodic benefit cost	$	(402)	$	89