Condensed Consolidating Financial Information (Condensed Consolidating Statement of Operations and Comprehensive Income (Loss)) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 28, 2014	Jun. 29, 2013	Jun. 28, 2014	Jun. 29, 2013
Condensed Financial Statements, Captions [Line Items]
Net sales	$ 479,410	$ 406,540	$ 969,529	$ 825,154
Cost of sales	399,436	337,135	814,593	689,037
Selling, general and administrative expenses	55,840	47,333	111,334	95,678
Amortization of intangible assets	3,449	2,506	6,898	5,013
Restructuring and other charges	7,338	2,724	13,285	6,906
Operating income	13,347	16,842	23,419	28,520
Interest expense, net	26,666	28,235	54,576	57,810
Intercompany interest (income) expense	0	0	0	0
Loss on early extinguishment of debt, net	26,480	7,720	26,498	7,847
Other expense (income), net	212	(2,291)	(297)	(1,995)
Loss from continuing operations before income taxes	(40,011)	(16,822)	(57,358)	(35,142)
Income tax (benefit) expense	(710)	2,174	(1,270)	4,344
(Loss) income from continuing operations before equity in (loss) income of subsidiaries	(39,301)	(18,996)	(56,088)	(39,486)
Equity in (loss) income of subsidiaries	0	0	0	0
Loss from continuing operations	(39,301)	(18,996)	(56,088)	(39,486)
Income from discontinued operations, net of taxes	664	113	1,617	1,458
Net loss	(38,637)	(18,883)	(54,471)	(38,028)
Other comprehensive income (loss):
Other comprehensive income (loss) of subsidiaries	0	0	0	0
Changes in pension and other employee benefit accounts, net of taxes	480	0	960	0
Currency translation adjustment	645	(2,329)	733	(3,108)
Comprehensive loss	(37,512)	(21,212)	(52,778)	(41,136)
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Net sales	0	0	0	0
Cost of sales	0	0	0	0
Selling, general and administrative expenses	0	0	0	0
Amortization of intangible assets	0	0	0	0
Restructuring and other charges	0	0	0	0
Operating income	0	0	0	0
Interest expense, net	0	0	0	0
Intercompany interest (income) expense	0	0	0	0
Loss on early extinguishment of debt, net	0	0	0	0
Other expense (income), net	0	0	0	0
Loss from continuing operations before income taxes	0	0	0	0
Income tax (benefit) expense	0	0	0	0
(Loss) income from continuing operations before equity in (loss) income of subsidiaries	0	0	0	0
Equity in (loss) income of subsidiaries	(38,637)	(18,883)	(54,471)	(38,028)
Loss from continuing operations	(38,637)	(18,883)	(54,471)	(38,028)
Income from discontinued operations, net of taxes	0	0	0	0
Net loss	(38,637)	(18,883)	(54,471)	(38,028)
Other comprehensive income (loss):
Other comprehensive income (loss) of subsidiaries	1,125	(2,329)	1,693	(3,108)
Changes in pension and other employee benefit accounts, net of taxes	0		0
Currency translation adjustment	0	0	0	0
Comprehensive loss	(37,512)	(21,212)	(52,778)	(41,136)
Subsidiary Issuer [Member]
Condensed Financial Statements, Captions [Line Items]
Net sales	227,225	160,726	468,692	328,430
Cost of sales	194,081	137,030	404,806	281,183
Selling, general and administrative expenses	33,898	26,661	67,506	53,642
Amortization of intangible assets	185	136	370	273
Restructuring and other charges	6,517	2,015	10,448	4,849
Operating income	(7,456)	(5,116)	(14,438)	(11,517)
Interest expense, net	26,519	28,134	54,342	57,598
Intercompany interest (income) expense	(216)	(304)	(486)	(654)
Loss on early extinguishment of debt, net	26,480	7,720	26,498	7,847
Other expense (income), net	409	509	226	878
Loss from continuing operations before income taxes	(60,648)	(41,175)	(95,018)	(77,186)
Income tax (benefit) expense	(597)	1,063	(988)	2,711
(Loss) income from continuing operations before equity in (loss) income of subsidiaries	(60,051)	(42,238)	(94,030)	(79,897)
Equity in (loss) income of subsidiaries	21,306	22,123	39,378	39,290
Loss from continuing operations	(38,745)	(20,115)	(54,652)	(40,607)
Income from discontinued operations, net of taxes	108	1,232	181	2,579
Net loss	(38,637)	(18,883)	(54,471)	(38,028)
Other comprehensive income (loss):
Other comprehensive income (loss) of subsidiaries	645	(2,329)	733	(3,108)
Changes in pension and other employee benefit accounts, net of taxes	480		960
Currency translation adjustment	0	0	0	0
Comprehensive loss	(37,512)	(21,212)	(52,778)	(41,136)
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Net sales	249,377	242,563	494,554	489,912
Cost of sales	203,786	196,847	405,330	401,544
Selling, general and administrative expenses	21,601	20,471	43,151	41,614
Amortization of intangible assets	3,131	2,237	6,262	4,475
Restructuring and other charges	821	700	2,837	2,044
Operating income	20,038	22,308	36,974	40,235
Interest expense, net	147	105	234	219
Intercompany interest (income) expense	216	304	486	654
Loss on early extinguishment of debt, net	0	0	0	0
Other expense (income), net	(219)	(2,604)	(544)	(2,699)
Loss from continuing operations before income taxes	19,894	24,503	36,798	42,061
Income tax (benefit) expense	(252)	1,149	(489)	1,608
(Loss) income from continuing operations before equity in (loss) income of subsidiaries	20,146	23,354	37,287	40,453
Equity in (loss) income of subsidiaries	604	(112)	655	(42)
Loss from continuing operations	20,750	23,242	37,942	40,411
Income from discontinued operations, net of taxes	556	(1,119)	1,436	(1,121)
Net loss	21,306	22,123	39,378	39,290
Other comprehensive income (loss):
Other comprehensive income (loss) of subsidiaries	(37)	(2,033)	582	(1,919)
Changes in pension and other employee benefit accounts, net of taxes	0		0
Currency translation adjustment	682	(296)	151	(1,189)
Comprehensive loss	21,951	19,794	40,111	36,182
Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Net sales	2,808	3,251	6,283	6,812
Cost of sales	1,569	3,258	4,457	6,310
Selling, general and administrative expenses	341	201	677	422
Amortization of intangible assets	133	133	266	265
Restructuring and other charges	0	9	0	13
Operating income	765	(350)	883	(198)
Interest expense, net	0	(4)	0	(7)
Intercompany interest (income) expense	0	0	0	0
Loss on early extinguishment of debt, net	0	0	0	0
Other expense (income), net	22	(196)	21	(174)
Loss from continuing operations before income taxes	743	(150)	862	(17)
Income tax (benefit) expense	139	(38)	207	25
(Loss) income from continuing operations before equity in (loss) income of subsidiaries	604	(112)	655	(42)
Equity in (loss) income of subsidiaries	0	0	0	0
Loss from continuing operations	604	(112)	655	(42)
Income from discontinued operations, net of taxes	0	0	0	0
Net loss	604	(112)	655	(42)
Other comprehensive income (loss):
Other comprehensive income (loss) of subsidiaries	0	0	0	0
Changes in pension and other employee benefit accounts, net of taxes	0		0
Currency translation adjustment	(37)	(2,033)	582	(1,919)
Comprehensive loss	567	(2,145)	1,237	(1,961)
Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Net sales	0	0	0	0
Cost of sales	0	0	0	0
Selling, general and administrative expenses	0	0	0	0
Amortization of intangible assets	0	0	0	0
Restructuring and other charges	0	0	0	0
Operating income	0	0	0	0
Interest expense, net	0	0	0	0
Intercompany interest (income) expense	0	0	0	0
Loss on early extinguishment of debt, net	0	0	0	0
Other expense (income), net	0	0	0	0
Loss from continuing operations before income taxes	0	0	0	0
Income tax (benefit) expense	0	0	0	0
(Loss) income from continuing operations before equity in (loss) income of subsidiaries	0	0	0	0
Equity in (loss) income of subsidiaries	16,727	(3,128)	14,438	(1,220)
Loss from continuing operations	16,727	(3,128)	14,438	(1,220)
Income from discontinued operations, net of taxes	0	0	0	0
Net loss	16,727	(3,128)	14,438	(1,220)
Other comprehensive income (loss):
Other comprehensive income (loss) of subsidiaries	(1,733)	6,691	(3,008)	8,135
Changes in pension and other employee benefit accounts, net of taxes	0		0
Currency translation adjustment	0	0	0	0
Comprehensive loss	$ 14,994	$ 3,563	$ 11,430	$ 6,915