Acquisitions Pro Forma Financial Information of EPG (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
Mar. 30, 2013	Mar. 31, 2012
Business Acquisition, Pro Forma Information [Abstract]
Net sales	$ 432,344	$ 455,583
Operating income	13,900	14,239
Income (loss) from continuing operations	(19,156)	(22,584)
Net loss	$ (19,145)	$ (27,218)
Continuing operations per share - basic	$ (0.30)	$ (0.36)
Discontinued operations per share - basic	$ 0.00	$ (0.07)
Net income (loss) per share - basic	$ (0.30)	$ (0.43)
Basic shares	63,840	63,407
Diluted shares	63,840	63,407
Business Combination, Pro Forma Information [Abstract]
Continuing operations per share - diluted	$ (0.30)	$ (0.36)
Discontinued operations per share - diluted	$ 0.00	$ (0.07)
Net income (loss) per share - diluted	$ (0.30)	$ (0.43)
Diluted shares	63,840	63,407

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