Discontinued Operations (Statement of Operations Information) (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 28, 2013	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Dec. 29, 2012	Sep. 29, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Discontinued Operations [Line Items]
Net sales									$ 34,891,000	$ 68,478,000	$ 164,427,000
Income from discontinued operations before income taxes									4,471,000	11,342,000	8,901,000
Income tax expense on discontinued operations									2,663,000	4,441,000	8,772,000
Gain (loss) on sale of discontinued operations, net of tax								(6,300,000)	14,933,000	(6,260,000)	0
Income from discontinued operations, net of taxes	1,791,000	13,492,000	113,000	1,345,000	646,000	1,453,000	1,389,000	(2,847,000)	16,741,000	641,000	129,000
Discontinued operations per share - basic	$ 0.03	$ 0.21	$ 0.00	$ 0.02	$ 0.01	$ 0.02	$ 0.02	$ (0.05)	$ 0.25	$ 0.01	$ 0.00
Discontinued operations per share - diluted	$ 0.03	$ 0.16	$ 0.00	$ 0.02	$ 0.01	$ 0.02	$ 0.02	$ (0.05)	$ 0.25	$ 0.01	$ 0.00
Tax expense (benefit) on income (loss) from discontinued operations								(2,600,000)	10,700,000	(2,600,000)
Impairment of goodwill related to discontinued operations									0	0	13,500,000
Prior Discontinued Operations [Member]
Discontinued Operations [Line Items]
Income from discontinued operations, net of taxes										1,800,000
Tax expense (benefit) on income (loss) from discontinued operations										$ 1,200,000