Goodwill And Other Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 29, 2015	Mar. 30, 2014	Dec. 28, 2014	May. 31, 2011
Business Acquisition [Line Items]
Intangible assets, net	$ 60,980		$ 64,940
Amortization expense	2,700	$ 2,900
Cash payment to escrow				$ 17,500
Acquisition costs	$ 79	$ 0
Two Thousand Ten Performance
Business Acquisition [Line Items]
Additional purchase price contingent on performance of acquired businesses				$ 6,300