Reorganization and Reorganization Costs Summary (Details) - USD ($) $ in Thousands	3 Months Ended							12 Months Ended
	Dec. 31, 2017	Oct. 01, 2017	Jul. 02, 2017	Jan. 01, 2017	Oct. 02, 2016	Jul. 03, 2016	Apr. 03, 2016	Dec. 31, 2017	Jan. 01, 2017	Jan. 03, 2016
Restructuring Cost and Reserve
Reorganization and realignment costs	$ 1,806	$ 2,888	$ 17,699	$ 2,217	$ 2,129	$ 2,487	$ 3,250	$ 22,574	$ 10,083	$ 21,910
G&A Realignment – May 2017 Plan
Restructuring Cost and Reserve
Reorganization and realignment costs								21,663	0	0
G&A Realignment - November 2014 Plan
Restructuring Cost and Reserve
Reorganization and realignment costs								0	692	10,342
System Optimization
Restructuring Cost and Reserve
Reorganization and realignment costs								$ 911	$ 9,391	$ 11,568