Non-Operating Income and Deductions, Net (Details) (USD $)	3 Months Ended
	Mar. 30, 2014	Mar. 31, 2013
Non-Operating Income and Deductions, Net [Abstract]
Interest income	$ 700,000	$ 700,000
Interest expense	(800,000)	(800,000)
Foreign exchange gains	100,000	600,000
Other deductions	(300,000)	(400,000)
Non-operating income (deductions), net	$ (310,000)	$ 133,000