Retirement Plans (Tables)

3 Months Ended

Mar. 28, 2015

Compensation and Retirement Disclosure [Abstract]

Schedule of net periodic (benefit) expenses

The components of the net periodic expense (benefit) for the Company’s pension plans, supplemental executive retirement plans ("SERP") and other postretirement benefit plans ("OPEB") are as follows (in thousands):

	For the Three Months Ended
	March 28, 2015			March 29, 2014
Service cost	$	—		$	—
Interest cost	3,524			3,707
Expected return on plan assets	(5,226		)	(5,206		)
Net amortization and deferral	—			—
Recognized net actuarial loss	2,156			794
Net periodic expense (benefit)	$	454		$	(705	)