Value Creation Plan (Table) (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended		12 Months Ended
	Jul. 01, 2017	Apr. 01, 2017	Jul. 02, 2016	Jul. 01, 2017	Jul. 02, 2016	Dec. 31, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 7,688	$ 17,283		$ 24,971		$ 18,326
Payments For Restructuring	(12,485)	(7,933)				(3,078)
Restructuring Reserve Settled Without Cash	51	(438)				(11,788)
Restructuring Reserve	7,626	12,372		7,626		3,460
Cost of goods sold	294,792		$ 312,168	586,124	$ 632,581
Selling, general and administrative expenses	35,039		$ 24,489	73,311	$ 48,761
Value Creation Plan [Member]
Restructuring Cost and Reserve [Line Items]
Cost of goods sold	262			634
Selling, general and administrative expenses	7,001			18,439
Other Expense	425			5,898
Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	262	4,095				11,522
Payments For Restructuring	(262)	(3,581)				0
Restructuring Reserve Settled Without Cash	0	(714)				(11,522)
Restructuring Reserve	(200)	(200)		(200)		0
Consulting and temporary labour costs
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	4,876	9,710				4,041
Payments For Restructuring	(9,538)	(1,774)				(2,384)
Restructuring Reserve Settled Without Cash	0	0				0
Restructuring Reserve	4,931	9,593		4,931		1,657
Employee Recruitment Retention and Termination Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	2,550	3,478				2,763
Payments For Restructuring	(2,685)	(2,578)				(694)
Restructuring Reserve Settled Without Cash	51	276				(266)
Restructuring Reserve	$ 2,895	$ 2,979		$ 2,895		$ 1,803