Costs Associated with Exit and Restructuring Activities - Restructuring Reserve Activity (Details) - June 2013 Plan and April 2014 Plan $ in Thousands	6 Months Ended
	Jun. 28, 2015 USD ($)
Restructuring reserve activity
Restructuring liability at beginning	$ 3,904
Restructuring and restructuring-related charges	3,148
Cost paid	(2,849)
Restructuring liability at ending	$ 4,203