Provision for Restructuring (Narrative) (Details) (USD $)	6 Months Ended
	Jun. 26, 2011
Charged to earnings	$ 3,331,000
Cash payments	3,299,000
Maximum [Member] | SG&A Restructuring Plan [Member]
Anticipated total costs	25,000,000
Minimum [Member] | SG&A Restructuring Plan [Member]
Anticipated total costs	20,000,000
SG&A Restructuring Plan [Member]
Charged to earnings	3,100,000
Costs incurred	12,900,000
Total number of employees affected by restructuring	204
Number of employees terminated	141
Manufacturing Restructuring Plan [Member]
Charged to earnings	23,000
Costs incurred	$ 4,200,000
Total number of employees affected by restructuring	420
Number of employees terminated	417