Goodwill And Other Intangible Assets (Schedule Of Components Of Goodwill) (Details) - USD ($) $ in Thousands	Mar. 27, 2016	Dec. 27, 2015	Dec. 28, 2014
Goodwill [Line Items]
Gross Amount	$ 371,039	$ 369,326
Accumulated Impairment Losses	205,216	205,216
Goodwill, Net	165,823	164,110	$ 173,569
Merchandise Availability Solutions
Goodwill [Line Items]
Gross Amount	176,928	175,602
Accumulated Impairment Losses	33,189	33,189
Goodwill, Net	143,739	142,413	149,646
Apparel Labeling Solutions
Goodwill [Line Items]
Gross Amount	82,747	82,747
Accumulated Impairment Losses	80,631	80,631
Goodwill, Net	2,116	2,116	2,116
Retail Merchandising Solutions
Goodwill [Line Items]
Gross Amount	111,364	110,977
Accumulated Impairment Losses	91,396	91,396
Goodwill, Net	$ 19,968	$ 19,581	$ 21,807