Discontinued Operations (Statement of Operations Information) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 26, 2015	Sep. 27, 2014	Sep. 26, 2015	Sep. 27, 2014
Discontinued Operations and Disposal Groups [Abstract]
Income from discontinued operations before income taxes	$ 846	$ 5,167	$ 3,151	$ 7,687
Income tax expense on discontinued operations	527	2,030	1,382	2,955
Gain on sale of discontinued operations	0	0	0	1,559
Gain on sale of discontinued operations, tax expense				1,000
Income from discontinued operations, net of taxes	$ 319	$ 3,137	$ 1,769	$ 6,291
Discontinued operations per share - basic	$ 0.00	$ 0.05	$ 0.02	$ 0.09
Discontinued operations per share - diluted	$ 0.00	$ 0.05	$ 0.02	$ 0.09