Value Creation Plan (Tables) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Restructuring Cost And Reserve [Line Items]
Restructuring Charges	$ 49,912	$ 18,326
Cost of goods sold	1,134,506	1,220,779	$ 1,034,772
Selling, general and administrative expenses	127,507	98,681	$ 85,754
Value Creation Plan [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring Charges	49,912	18,326
Payments For Restructuring	(38,614)	(3,078)
Restructuring Reserve Settled Without Cash	(11,031)	(11,788)
Restructuring Reserve	3,727	3,460
Facility Closing [Member] | Value Creation Plan [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring Charges	21,766	11,522
Payments For Restructuring	(10,746)	0
Restructuring Reserve Settled Without Cash	(11,720)	(11,522)
Restructuring Reserve	(700)	0
Consulting and temporary labour costs | Value Creation Plan [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring Charges	16,528	4,041
Payments For Restructuring	(18,185)	(2,384)
Restructuring Reserve Settled Without Cash	0	0
Restructuring Reserve	0	1,657
Employee Recruitment Retention And Termination Costs [Member] | Value Creation Plan [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring Charges	11,618	2,763
Payments For Restructuring	(9,683)	(694)
Restructuring Reserve Settled Without Cash	689	(266)
Restructuring Reserve	$ 4,427	$ 1,803