Discontinued Operations (Statement of Operations Information) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2017	Jul. 02, 2016	Jul. 01, 2017	Jul. 02, 2016
Discontinued Operations and Disposal Groups [Abstract]
Net sales		$ 0		$ 6,637
Cost of sales		0		6,625
Selling, general and administrative expenses		0		2,242
Restructuring and other charges		0		1
Interest expense, net		0		7
Other expense, net		0		238
Loss from discontinued operations		0		(2,476)
Loss on sale of discontinued operations		(3,304)		(1,273)
Loss from discontinued operations before income taxes		(3,304)		(3,749)
Income tax expense		0		1,372
Loss from discontinued operations, net of taxes	$ 0	$ (3,304)	$ 0	$ (5,121)
Discontinued operations per share - basic	$ 0.00	$ (0.39)	$ 0.00	$ (0.60)
Discontinued operations per share - diluted	$ 0.00	$ (0.33)	$ 0.00	$ (0.51)