Goodwill And Other Intangible Assets (Schedule Of Components Of Goodwill) (Details) - USD ($) $ in Thousands	Sep. 27, 2015	Dec. 28, 2014	Dec. 29, 2013
Goodwill [Line Items]
Gross Amount	$ 373,924	$ 400,837
Accumulated Impairment Losses	207,938	227,268
Goodwill, Net	165,986	173,569	$ 185,864
Merchandise Availability Solutions
Goodwill [Line Items]
Gross Amount	177,916	192,303
Accumulated Impairment Losses	34,052	42,657
Goodwill, Net	143,864	149,646	159,157
Apparel Labeling Solutions
Goodwill [Line Items]
Gross Amount	83,010	84,407
Accumulated Impairment Losses	80,894	82,291
Goodwill, Net	2,116	2,116	2,116
Retail Merchandising Solutions
Goodwill [Line Items]
Gross Amount	112,998	124,127
Accumulated Impairment Losses	92,992	102,320
Goodwill, Net	$ 20,006	$ 21,807	$ 24,591