CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 27, 2015	Jun. 28, 2014	Jun. 27, 2015	Jun. 28, 2014
Income Statement [Abstract]
Net sales	$ 460,857	$ 479,410	$ 935,962	$ 969,529
Cost of sales	384,105	399,436	781,993	814,593
Selling, general and administrative expenses	49,037	55,840	101,298	111,334
Amortization of intangible assets	2,446	3,449	4,853	6,898
Restructuring and other charges	2,040	7,338	6,394	13,285
Operating income	23,229	13,347	41,424	23,419
Interest expense, net	25,278	26,666	50,970	54,576
Loss on early extinguishment of debt, net	126	26,480	559	26,498
Other expense (income), net	347	212	130	(297)
Loss from continuing operations before income taxes	(2,522)	(40,011)	(10,235)	(57,358)
Income tax benefit	(103)	(710)	(169)	(1,270)
Loss from continuing operations	(2,419)	(39,301)	(10,066)	(56,088)
Income (loss) from discontinued operations, net of taxes	14	664	(18)	1,617
Net loss	(2,405)	(38,637)	(10,084)	(54,471)
Other comprehensive income (loss):
Changes in pension and other employee benefit accounts, net of taxes	1,342	480	2,684	960
Currency translation adjustment	91	645	(1,239)	733
Comprehensive loss	$ (972)	$ (37,512)	$ (8,639)	$ (52,778)
(Loss) income per share – basic:
Continuing operations per share - basic	$ (0.04)	$ (0.59)	$ (0.15)	$ (0.84)
Discontinued operations per share - basic	0.00	0.01	0.00	0.02
Net loss per share - basic	(0.04)	(0.58)	(0.15)	(0.82)
(Loss) income per share – diluted:
Continuing operations per share - diluted	(0.04)	(0.59)	(0.15)	(0.84)
Discontinued operations per share - diluted	0.00	0.01	0.00	0.02
Net loss per share - diluted	$ (0.04)	$ (0.58)	$ (0.15)	$ (0.82)
Weighted average shares outstanding:
Basic shares	67,831	66,496	67,789	66,416
Diluted shares	67,831	66,496	67,789	66,416