Acquisitions Pro Forma Financial Information of EPG (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 29, 2013	Jun. 30, 2012	Jun. 29, 2013	Jun. 30, 2012
Business Acquisition, Pro Forma Information [Abstract]
Net sales	$ 415,702	$ 433,218	$ 843,993	$ 882,977
Operating income	19,165	28,565	33,454	42,718
Income (loss) from continuing operations	(17,587)	(214)	(36,494)	(22,848)
Net loss	$ (18,883)	$ (401)	$ (38,028)	$ (27,619)
Continuing operations per share - basic	$ (0.28)	$ (0.01)	$ (0.57)	$ (0.36)
Discontinued operations per share - basic	$ (0.02)	$ 0.00	$ (0.03)	$ (0.08)
Net income (loss) per share - basic	$ (0.30)	$ (0.01)	$ (0.60)	$ (0.44)
Basic shares	63,922	63,476	63,881	63,441
Diluted shares	63,922	63,476	63,881	63,441
Business Combination, Pro Forma Information [Abstract]
Continuing operations per share - diluted	$ (0.28)	$ (0.01)	$ (0.57)	$ (0.36)
Discontinued operations per share - diluted	$ (0.02)	$ 0.00	$ (0.03)	$ (0.08)
Net income (loss) per share - diluted	$ (0.30)	$ (0.01)	$ (0.60)	$ (0.44)
Diluted shares	63,922	63,476	63,881	63,441