Pension Plans (Tables)

3 Months Ended

Mar. 30, 2018

Defined Benefit Plan [Abstract]

Schedule of Net Benefit Costs

Components of net pension cost for the Qualified Pension Plan and Supplemental Employees’ Retirement Plan ("SERP") are as follows:

	For the Three Months Ended
	Qualified Pension Plan						SERP
	March 30, 2018			March 31, 2017			March 30, 2018		March 31, 2017
In thousands
Service cost	$	1,224		$	1,198		$	—	$	—
Interest cost on projected benefit obligation	5,951			6,089			54		61
Expected return on plan assets	(11,960		)	(10,512		)	—		—
Amortization of net loss	2,843			3,486			83		58
Additional amount recognized due to curtailment/settlement	—			—			—		99
Net pension cost	$	(1,942	)	$	261		$	137	$	218