Discontinued Operations (Statement of Operations Information) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Apr. 02, 2016	Mar. 28, 2015
Discontinued Operations and Disposal Groups [Abstract]
Net sales	$ 6,637	$ 45,428
Cost of sales	6,625	39,141
Selling, general and administrative expenses	2,242	5,104
Amortization of intangible assets	0	539
Restructuring and other charges	1	285
Interest expense, net	7	33
Other expense (income), net	238	(385)
(Loss) income from discontinued operations before income taxes	(2,476)	711
Gain on sale of discontinued operations before income taxes	2,031	0
(Loss) income from discontinued operations before income taxes	(445)	711
Income tax expense	1,372	211
(Loss) income from discontinued operations, net of taxes	$ (1,817)	$ 500
Discontinued operations per share - basic	$ (0.02)	$ 0.01
Discontinued operations per share - diluted	$ (0.02)	$ 0.01