Loss Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Apr. 01, 2012
Earnings Per Share (Thousands of Dollars and Shares Except Per Share Data) [Abstract]
Net loss	$ (6,671)	$ (2,579)
Basic [Abstract]
Weighted Average Number of Shares Outstanding	129,340	129,569
Net earnings per common share-basic (in dollars per share)	$ (0.05)	$ (0.02)
Diluted [Abstract]
Weighted Average Number of Shares Outstanding	129,340	129,569
Net earnings per common share-diluted (in dollars per share)	$ (0.05)	$ (0.02)
Options to acquire shares totaling excluded as antidilutive	8,731	12,011
Shares that would have been included in the calculation of diluted shares had the Company not had a net loss during the period.	7,559	8,469
Shares that would have been included in the diluted earnings per share calculation had the Company not had a net loss during the period.	1,524	1,991
Equivalents shares had the Company not had a net loss during the period	130,864	131,560