Goodwill And Other Intangible Assets (Schedule Of Components Of Goodwill) (Details) - USD ($) $ in Thousands	Mar. 29, 2015	Dec. 28, 2014	Dec. 29, 2013
Goodwill [Line Items]
Gross Amount	$ 371,544	$ 400,837
Accumulated Impairment Losses	207,517	227,268
Goodwill, Net	164,027	173,569	$ 185,864
Merchandise Availability Solutions
Goodwill [Line Items]
Gross Amount	176,091	192,303
Accumulated Impairment Losses	33,701	42,657
Goodwill, Net	142,390	149,646	159,157
Apparel Labeling Solutions
Goodwill [Line Items]
Gross Amount	83,291	84,407
Accumulated Impairment Losses	81,175	82,291
Goodwill, Net	2,116	2,116	2,116
Retail Merchandising Solutions
Goodwill [Line Items]
Gross Amount	112,162	124,127
Accumulated Impairment Losses	92,641	102,320
Goodwill, Net	$ 19,521	$ 21,807	$ 24,591