Employee Benefit Plans (Tables)

9 Months Ended

Sep. 28, 2012

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 28, 2012						September 30, 2011						September 28, 2012						September 30, 2011
	U.S. Plan			UK Plan			U.S. Plan			UK Plan			U.S. Plan			UK Plan			U.S. Plan			UK Plan
	(in thousands)												(in thousands)
Components of net periodic pension cost
Service cost	$	19		$	—		$	10		$	—		$	57		$	—		$	30		$	—
Interest cost	128			590			128			598			384			1,770			384			1,783
Expected return on assets	(144		)	(418		)	(140		)	(464		)	(432		)	(1,254		)	(420		)	(1,384		)
Recognized actuarial net loss	62			24			11			—			186			70			32			—
Total Company defined benefit plan expense	65			196			9			134			195			586			26			399
Multiemployer benefit expense	308			—			352			—			884			—			925			—
Multiemployer pension withdrawal penalty	39			—			—			—			39			—			1,200			—
Net periodic pension cost	$	412		$	196		$	361		$	134		$	1,118		$	586		$	2,151		$	399