Basis of Presentation (Reclassification) (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jul. 01, 2017	Apr. 01, 2017	Jul. 02, 2016	Jul. 01, 2017	Jul. 02, 2016
Prior Period Adjustments Restatement [Line Items]
Net sales	$ 354,982	$ 381,913	$ 410,053	$ 736,895	$ 850,632
Cost of sales	$ 297,684	317,779	341,490	$ 615,463	711,219
Previously Reported [Member]
Prior Period Adjustments Restatement [Line Items]
Net sales		374,506	404,041		836,802
Cost of sales		310,372	335,478		697,389
Reclassification Adjustment [Member]
Prior Period Adjustments Restatement [Line Items]
Net sales		7,407	6,012		13,830
Cost of sales		$ 7,407	$ 6,012		$ 13,830