Employee Benefit Plans (Tables)

9 Months Ended

Sep. 27, 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												Nine months ended
	September 27, 2013						September 28, 2012						September 27, 2013						September 28, 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		$	—		$	48		$	—		$	57		$	—
Interest cost	130			527			128			590			390			1,582			384			1,770
Expected return on assets	(156		)	(411		)	(144		)	(418		)	(468		)	(1,233		)	(432		)	(1,254		)
Recognized actuarial net loss	73			8			62			24			217			29			186			70
Total defined benefit net periodic pension cost	63			124			65			196			187			378			195			586
Multiemployer benefit expense	313			—			308			—			860			—			884			—
Multiemployer pension withdrawal expense	—			—			39			—			—			—			39			—
Net periodic pension cost	$	376		$	124		$	412		$	196		$	1,047		$	378		$	1,118		$	586