Contingencies And Commitments (Schedule Of Changes In Accrued Warranty Costs) (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Jan. 01, 2011
Contingencies And Commitments [Abstract]
Beginning balance	$ 12,831,000	$ 13,298,000
Payments	(18,152,000)	(14,420,000)
Provision	25,830,000	13,793,000
Acquisitions	3,897,000
Translation	(250,000)	160,000
Ending balance	24,156,000	12,831,000
Accrued warranty costs	$ 12,600,000