Employee Benefit Plans (Tables)

6 Months Ended

Jun. 27, 2014

Compensation and Retirement Disclosure [Abstract]

Schedule of Net Benefit Costs

Components of net periodic pension cost for the Company’s defined and multiemployer pension plans were as follows:

	Three months ended												Six months ended
	June 27, 2014						June 28, 2013						June 27, 2014						June 28, 2013
	U.S. Plan			UK Plan			U.S. Plan			UK Plan			U.S. Plan			UK Plan			U.S. Plan			UK Plan
	(in thousands)
Service cost	$	14		$	—		$	16		$	—		$	28		$	—		$	32		$	—
Interest cost	140			562			130			524			280			1,114			260			1,055
Expected return on assets	(186		)	(474		)	(156		)	(408		)	(372		)	(940		)	(312		)	(822		)
Recognized actuarial net loss	2			19			71			10			4			37			144			21
Total defined benefit net periodic pension cost	(30		)	107			61			126			(60		)	211			124			254
Multiemployer benefit expense	311			—			295			—			569			—			547			—
Net periodic pension cost	$	281		$	107		$	356		$	126		$	509		$	211		$	671		$	254