Restructuring (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended			3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended		3 Months Ended	9 Months Ended		9 Months Ended		15 Months Ended
	Sep. 28, 2014	Sep. 29, 2013	Sep. 28, 2014	Sep. 29, 2013	Dec. 29, 2013	Sep. 28, 2014 Rogers, Arkansas facility closure [Member]	Sep. 28, 2014 Rogers, Arkansas facility closure [Member]	Sep. 28, 2014 Rogers, Arkansas facility closure [Member] Cost of Sales, Restructuring Costs [Member]	Sep. 28, 2014 Rogers, Arkansas facility closure [Member] Cost of Sales, Restructuring Costs [Member]	Sep. 28, 2014 Accelerated Depreciation [Member] Rogers, Arkansas facility closure [Member] Cost of Sales, Restructuring Costs [Member]	Sep. 28, 2014 One-time Termination Benefits [Member] Rogers, Arkansas facility closure [Member] Cost of Sales, Restructuring Costs [Member]	Sep. 28, 2014 One-time Termination Benefits [Member] Rogers, Arkansas facility closure [Member] Cost of Sales, Restructuring Costs [Member]	Sep. 28, 2014 Other Restructuring [Member] Rogers, Arkansas facility closure [Member] Cost of Sales, Restructuring Costs [Member]	Sep. 28, 2014 Other Restructuring [Member] Rogers, Arkansas facility closure [Member] Cost of Sales, Restructuring Costs [Member]	Sep. 28, 2014 Restructuring Charges, Excluding Accelerated Depreciation [Member]	Dec. 27, 2015 Scenario, Forecast [Member]	Dec. 28, 2014 Scenario, Forecast [Member] Rogers, Arkansas facility closure [Member]	Dec. 28, 2014 Scenario, Forecast [Member] One-time Termination Benefits [Member] Rogers, Arkansas facility closure [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Number of Positions Eliminated							500
Restructuring and Related Cost, Accelerated Depreciation								$ 3,112	$ 3,112
Restructuring and Related Cost, Expected Cost Remaining								6,357	6,357	3,145	1,158	1,158		2,054				1,200
Expected Restructuring Charges								10,519	10,519	6,257	1,958	1,958	10,500	2,304			4,300
Restructuring and Related Cost, Incurred Cost								4,162				800		250
Restructuring Reserve	1,050		1,050		0
Restructuring Charges	4,162	0	4,162	0		1,100					800				1,050
Payments for Restructuring			$ 0													$ 3,800