Non-Operating Income and Deductions, Net (Details) (USD $)	3 Months Ended
	Mar. 31, 2013	Apr. 01, 2012
Non-Operating Deductions, Net [Abstract]
Interest income	$ 700,000	$ 1,000,000
Interest expense	(800,000)	(800,000)
Foreign exchange gains (losses)	600,000	(400,000)
Other deductions	(300,000)	(400,000)
Non-operating deductions, net	$ 168,000	$ (598,000)