Non-Operating Deductions, Net (Details) (USD $)	3 Months Ended		9 Months Ended
	Oct. 02, 2011	Oct. 03, 2010	Oct. 02, 2011	Oct. 03, 2010
Non-Operating Deductions, Net [Abstract]
Interest income	$ 1,100,000	$ 700,000	$ 2,900,000	$ 1,800,000
Interest expense	(800,000)	(900,000)	(2,400,000)	(2,400,000)
Foreign exchange gains (losses)	(200,000)	100,000	(1,500,000)	500,000
Foreign currency translation loss upon liquidation	(1,400,000)	0	(1,400,000)	0
Gain Loss On Contract Termination	0	0	0	800,000
Gain on sale of previously impaired assets	0	0	0	200,000
Other deductions	(400,000)	(100,000)	(900,000)	(600,000)
Non-operating deductions, net	$ (1,663,000)	$ (177,000)	$ (3,299,000)	$ 309,000