Employee Benefit Plans (Tables)

9 Months Ended

Sep. 26, 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												Nine months ended
	September 26, 2014						September 27, 2013						September 26, 2014						September 27, 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		$	—		$	42		$	—		$	48		$	—
Interest cost	141			559			130			527			421			1,673			390			1,582
Expected return on assets	(185		)	(472		)	(156		)	(411		)	(557		)	(1,412		)	(468		)	(1,233		)
Recognized actuarial net loss	3			18			73			8			7			55			217			29
Total defined benefit net periodic pension cost	(27		)	105			63			124			(87		)	316			187			378
Multiemployer benefit expense	324			—			313			—			893			—			860			—
Net periodic pension cost	$	297		$	105		$	376		$	124		$	806		$	316		$	1,047		$	378