Goodwill And Other Intangible Assets (Schedule Of Components Of Goodwill) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013		Dec. 30, 2012		Dec. 25, 2011
Goodwill [Line Items]
Gross Amount	$ 417,213		$ 426,601
Accumulated Impairment Losses	237,926		243,860
Goodwill, Net	179,287	[1]	182,741	[1]	286,103
Shrink Management Solutions [Member]
Goodwill [Line Items]
Gross Amount	202,560		208,835
Accumulated Impairment Losses	46,280		49,804
Goodwill, Net	156,280		159,031		161,811
Apparel Labeling Solutions [Member]
Goodwill [Line Items]
Gross Amount	83,319		84,059
Accumulated Impairment Losses	83,319		84,059
Goodwill, Net	0		0		62,584
Retail Merchandising Solutions [Member]
Goodwill [Line Items]
Gross Amount	131,334		133,707
Accumulated Impairment Losses	108,327		109,997
Goodwill, Net	$ 23,007		$ 23,710		$ 61,708

[1] Derived from the Company’s audited Consolidated Financial Statements at December 30, 2012.