Non-Operating Deductions, Net (Details) (USD $)	3 Months Ended		6 Months Ended
	Jul. 01, 2012	Jul. 03, 2011	Jul. 01, 2012	Jul. 03, 2011
Non-Operating Deductions, Net [Abstract]
Interest income	$ 800,000	$ 1,000,000	$ 1,800,000	$ 1,800,000
Interest expense	(800,000)	(800,000)	(1,600,000)	(1,600,000)
Foreign exchange gains (losses)	(300,000)	(800,000)	(700,000)	(1,300,000)
Other deductions	(500,000)	(200,000)	(900,000)	(500,000)
Non-operating deductions, net	$ (768,000)	$ (799,000)	$ (1,366,000)	$ (1,636,000)