Non-Operating Deductions, Net (Details) (USD $)	3 Months Ended		6 Months Ended
	Jul. 03, 2011	Jul. 04, 2010	Jul. 03, 2011	Jul. 04, 2010
Non-Operating Deductions, Net [Abstract]
Interest income	$ 1,000,000	$ 600,000	$ 1,800,000	$ 1,100,000
Interest expense	(800,000)	(700,000)	(1,600,000)	(1,500,000)
Foreign exchange gains (losses)	(800,000)	(400,000)	(1,300,000)	400,000
Gain Loss On Contract Termination	0	800,000	0	800,000
Gain on sale of previously impaired assets	0	200,000	0	200,000
Other deductions	(200,000)	0	(500,000)	(500,000)
Non-operating deductions, net	$ (799,000)	$ 535,000	$ (1,636,000)	$ 486,000