Restructuring And Other, Net (Schedule Of Restructuring And Other, Net) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Apr. 01, 2012	Dec. 31, 2011
Restructuring Cost and Reserve [Line Items]
Ending balance	$ 1,673
Facility Exit Costs [Member]
Restructuring Cost and Reserve [Line Items]
Ending balance	1,673
Pre-2011 Activities [Member]
Restructuring Cost and Reserve [Line Items]
Beginning balance	1,862	3,975
Provision		117
Change in estimate		(330)
Cash payments	(189)	(1,900)
Ending balance	1,673	1,862
Pre-2011 Activities [Member] | Severance And Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Beginning balance		712
Provision		117
Change in estimate		155
Cash payments		(984)
Pre-2011 Activities [Member] | Facility Exit Costs [Member]
Restructuring Cost and Reserve [Line Items]
Beginning balance	1,862	3,263
Change in estimate		(485)
Cash payments	(189)	(916)
Ending balance	1,673	1,862
Q1 2011 Activity [Member]
Restructuring Cost and Reserve [Line Items]
Beginning balance	96
Provision		572
Cash payments	(96)	(476)
Ending balance		96
Q1 2011 Activity [Member] | Severance And Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Beginning balance	96
Provision		572
Cash payments	(96)	(476)
Ending balance		96
Q2 2011 Activity [Member]
Restructuring Cost and Reserve [Line Items]
Beginning balance	229
Provision		344
Cash payments	(229)	(115)
Ending balance		229
Q2 2011 Activity [Member] | Severance And Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Beginning balance	229
Provision		344
Cash payments	(229)	(115)
Ending balance		$ 229