Goodwill And Other Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
	Aug. 25, 2015	Sep. 27, 2015	Sep. 28, 2014	Sep. 27, 2015	Sep. 28, 2014	Dec. 28, 2014	May. 31, 2011
Business Acquisition [Line Items]
Intangible assets, net		$ 55,772		$ 55,772		$ 64,940
Amortization expense		2,700	$ 2,800	8,100	$ 8,400
Cash payment to escrow							$ 17,500
Escrow amount paid related to acquisition	$ 17,500
Acquisition costs		$ 15	$ 291	$ 135	$ 291
Two Thousand Ten Performance
Business Acquisition [Line Items]
Additional purchase price contingent on performance of acquired businesses							$ 6,300