Restructuring (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended	12 Months Ended	36 Months Ended
	Jun. 25, 2017	Dec. 25, 2016	Jun. 26, 2016	Jun. 25, 2017	Dec. 25, 2016	Dec. 25, 2016	Dec. 31, 2016
Rogers, Arkansas facility closure [Member] | Cost of Sales, Restructuring Costs [Member]
Restructuring Cost and Reserve [Line Items]
Expected Restructuring Charges	$ 16,029			$ 16,029
Restructuring and Related Cost, Incurred Cost	100		$ 200			$ 15,899
Accelerated Depreciation [Member] | Rogers, Arkansas facility closure [Member] | Cost of Sales, Restructuring Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Accelerated Depreciation				13		7,254
Expected Restructuring Charges	7,267			7,267
One-time Termination Benefits [Member] | Rogers, Arkansas facility closure [Member] | Cost of Sales, Restructuring Costs [Member]
Restructuring Cost and Reserve [Line Items]
Expected Restructuring Charges	2,011			2,011
Restructuring and Related Cost, Incurred Cost				0		2,011
Other Restructuring [Member] | Rogers, Arkansas facility closure [Member] | Cost of Sales, Restructuring Costs [Member]
Restructuring Cost and Reserve [Line Items]
Expected Restructuring Charges	6,751			6,751
Restructuring and Related Cost, Incurred Cost				117		$ 6,634
Restructuring Costs, All Costs [Member] | Rogers, Arkansas facility closure [Member]
Restructuring Cost and Reserve [Line Items]
Expected Restructuring Charges	$ 14,593			14,593			$ 14,463
Restructuring and Related Cost, Incurred Cost				130
Building [Member]
Restructuring Cost and Reserve [Line Items]
Proceeds from Sale of Buildings		$ 4,300
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property				$ (1,436)	$ (1,436)