Employee Benefit Plans (Tables)

6 Months Ended

Jun. 28, 2013

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 28, 2013						June 29, 2012						June 28, 2013						June 29, 2012
	U.S. Plan			UK Plan			U.S. Plan			UK Plan			U.S. Plan			UK Plan			U.S. Plan			UK Plan
	(in thousands)
Service cost	$	16		$	—		$	19		$	—		$	32		$	—		$	38		$	—
Interest cost	130			524			128			599			260			1,055			256			1,180
Expected return on assets	(156		)	(408		)	(144		)	(424		)	(312		)	(822		)	(288		)	(836		)
Recognized actuarial net loss	71			10			62			23			144			21			124			46
Total defined benefit net periodic pension cost	61			126			65			198			124			254			130			390
Multiemployer benefit expense	295			—			298			—			547			—			576			—
Net periodic pension cost	$	356		$	126		$	363		$	198		$	671		$	254		$	706		$	390