Retirement Plans (Tables)

6 Months Ended

Jun. 27, 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						For the Six Months Ended
	June 27, 2015			June 28, 2014			June 27, 2015			June 28, 2014
Service cost	$	—		$	—		$	1		$	1
Interest cost	3,524			3,707			7,048			7,413
Expected return on plan assets	(5,226		)	(5,206		)	(10,452		)	(10,412		)
Net amortization and deferral	—			—			—			—
Recognized net actuarial loss	2,156			794			4,312			1,587
Net periodic expense (benefit)	$	454		$	(705	)	$	909		$	(1,411	)