Pension Plans (Tables)

3 Months Ended

Mar. 31, 2017

Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [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 31, 2017			April 1, 2016			March 31, 2017		April 1, 2016
In thousands
Service cost	$	1,198		$	1,149		$	—	$	—
Interest cost on projected benefit obligation	6,089			6,122			61		64
Expected return on plan assets	(10,512		)	(10,192		)	—		—
Amortization of net loss	3,486			3,173			58		45
Additional amount recognized due to curtailment/settlement	—			—			99		—
Net pension cost	$	261		$	252		$	218	$	109