Goodwill And Other Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 28, 2015	Jun. 29, 2014	Jun. 28, 2015	Jun. 29, 2014	Dec. 28, 2014	May. 31, 2011
Business Acquisition [Line Items]
Intangible assets, net	$ 58,584		$ 58,584		$ 64,940
Amortization expense	2,700	$ 2,700	5,400	$ 5,600
Cash payment to escrow						$ 17,500
Acquisition costs	$ 41	$ 0	$ 120	$ 0
Two Thousand Ten Performance
Business Acquisition [Line Items]
Additional purchase price contingent on performance of acquired businesses						$ 6,300