Provision For Restructuring (Schedule Of Restructuring Expense) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 25, 2012
Restructuring Cost and Reserve [Line Items]
Asset impairments	$ 731	$ 0
Total	2,016	1,718
Global Restructuring Plan (including LEAN) [Member]
Restructuring Cost and Reserve [Line Items]
Severance and other employee-related charges	339	558
Asset impairments	731	0
Other exit costs	885	721
Total	1,955
SG&A Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Severance and other employee-related charges	(16)	373
Other exit costs	77	66
Total	$ 61