Condensed Consolidating Financial Information (Condensed Consolidating Statement of Operations and Comprehensive Income (Loss)) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013
Condensed Financial Statements, Captions [Line Items]
Net sales	$ 480,576	$ 442,781	$ 1,450,105	$ 1,267,935
Cost of sales	410,142	367,356	1,224,735	1,056,392
Selling, general and administrative expenses	53,077	53,105	164,411	148,783
Amortization of intangible assets	2,456	2,459	9,354	7,473
Restructuring and other charges	5,571	3,337	18,856	10,243
Operating income	9,330	16,524	32,749	45,044
Gain on bargain purchase	0	(17,262)	0	(17,262)
Interest expense, net	26,014	27,611	80,590	85,421
Intercompany interest (income) expense	0	0	0	0
Loss on early extinguishment of debt, net	1,280	1,593	27,778	9,440
Other income, net	(7,013)	595	(7,310)	(1,400)
(Loss) income from continuing operations before income taxes	(10,951)	3,987	(68,309)	(31,155)
Income tax expense (benefit)	(157)	(9,440)	(1,427)	(5,096)
(Loss) income from continuing operations before equity in (loss) income of subsidiaries	(10,794)	13,427	(66,882)	(26,059)
Equity in (loss) income of subsidiaries	0	0	0	0
(Loss) income from continuing operations	(10,794)	13,427	(66,882)	(26,059)
(Loss) income from discontinued operations, net of taxes	(99)	13,492	1,518	14,950
Net (loss) income	(10,893)	26,919	(65,364)	(11,109)
Other comprehensive income (loss):
Other comprehensive (loss) income of subsidiaries	0	0	0	0
Changes in pension and other employee benefit accounts, net of taxes	480	0	1,440	0
Currency translation adjustment	(1,067)	(31)	(334)	(3,139)
Comprehensive (loss) income	(11,480)	26,888	(64,258)	(14,248)
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
Gain on bargain purchase		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 income, net	0	0	0	0
(Loss) income from continuing operations before income taxes	0	0	0	0
Income tax expense (benefit)	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	(10,893)	26,919	(65,364)	(11,109)
(Loss) income from continuing operations	(10,893)	26,919	(65,364)	(11,109)
(Loss) income from discontinued operations, net of taxes	0	0	0	0
Net (loss) income	(10,893)	26,919	(65,364)	(11,109)
Other comprehensive income (loss):
Other comprehensive (loss) income of subsidiaries	(587)	(31)	1,106	(3,139)
Changes in pension and other employee benefit accounts, net of taxes	0		0
Currency translation adjustment	0	0	0	0
Comprehensive (loss) income	(11,480)	26,888	(64,258)	(14,248)
Subsidiary Issuer [Member]
Condensed Financial Statements, Captions [Line Items]
Net sales	230,496	187,592	699,188	516,022
Cost of sales	204,889	163,606	609,695	444,788
Selling, general and administrative expenses	30,705	30,172	98,211	83,814
Amortization of intangible assets	181	137	551	411
Restructuring and other charges	5,043	1,992	15,491	6,841
Operating income	(10,322)	(8,315)	(24,760)	(19,832)
Gain on bargain purchase		(17,270)		(17,270)
Interest expense, net	25,893	27,482	80,235	85,080
Intercompany interest (income) expense	(341)	(281)	(827)	(935)
Loss on early extinguishment of debt, net	1,280	1,593	27,778	9,440
Other income, net	(674)	768	(448)	1,646
(Loss) income from continuing operations before income taxes	(36,480)	(20,607)	(131,498)	(97,793)
Income tax expense (benefit)	383	(3,544)	(605)	(833)
(Loss) income from continuing operations before equity in (loss) income of subsidiaries	(36,863)	(17,063)	(130,893)	(96,960)
Equity in (loss) income of subsidiaries	25,962	37,380	65,340	76,670
(Loss) income from continuing operations	(10,901)	20,317	(65,553)	(20,290)
(Loss) income from discontinued operations, net of taxes	8	6,602	189	9,181
Net (loss) income	(10,893)	26,919	(65,364)	(11,109)
Other comprehensive income (loss):
Other comprehensive (loss) income of subsidiaries	(1,067)	(31)	(334)	(3,139)
Changes in pension and other employee benefit accounts, net of taxes	480		1,440
Currency translation adjustment	0	0	0	0
Comprehensive (loss) income	(11,480)	26,888	(64,258)	(14,248)
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Net sales	246,196	251,212	740,750	741,124
Cost of sales	202,812	200,099	608,142	601,643
Selling, general and administrative expenses	21,923	22,704	65,074	64,318
Amortization of intangible assets	2,164	2,189	8,426	6,664
Restructuring and other charges	528	1,344	3,365	3,388
Operating income	18,769	24,876	55,743	65,111
Gain on bargain purchase		8		8
Interest expense, net	121	122	355	341
Intercompany interest (income) expense	341	281	827	935
Loss on early extinguishment of debt, net	0	0	0	0
Other income, net	(6,305)	(84)	(6,849)	(2,783)
(Loss) income from continuing operations before income taxes	24,612	24,549	61,410	66,610
Income tax expense (benefit)	(737)	(5,932)	(1,226)	(4,324)
(Loss) income from continuing operations before equity in (loss) income of subsidiaries	25,349	30,481	62,636	70,934
Equity in (loss) income of subsidiaries	720	9	1,375	(33)
(Loss) income from continuing operations	26,069	30,490	64,011	70,901
(Loss) income from discontinued operations, net of taxes	(107)	6,890	1,329	5,769
Net (loss) income	25,962	37,380	65,340	76,670
Other comprehensive income (loss):
Other comprehensive (loss) income of subsidiaries	(293)	(1,073)	289	(2,992)
Changes in pension and other employee benefit accounts, net of taxes	0		0
Currency translation adjustment	(774)	1,042	(623)	(147)
Comprehensive (loss) income	24,895	37,349	65,006	73,531
Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Net sales	3,884	3,977	10,167	10,789
Cost of sales	2,441	3,651	6,898	9,961
Selling, general and administrative expenses	449	229	1,126	651
Amortization of intangible assets	111	133	377	398
Restructuring and other charges	0	1	0	14
Operating income	883	(37)	1,766	(235)
Gain on bargain purchase		0		0
Interest expense, net	0	7	0	0
Intercompany interest (income) expense	0	0	0	0
Loss on early extinguishment of debt, net	0	0	0	0
Other income, net	(34)	(89)	(13)	(263)
(Loss) income from continuing operations before income taxes	917	45	1,779	28
Income tax expense (benefit)	197	36	404	61
(Loss) income from continuing operations before equity in (loss) income of subsidiaries	720	9	1,375	(33)
Equity in (loss) income of subsidiaries	0	0	0	0
(Loss) income from continuing operations	720	9	1,375	(33)
(Loss) income from discontinued operations, net of taxes	0	0	0	0
Net (loss) income	720	9	1,375	(33)
Other comprehensive income (loss):
Other comprehensive (loss) income of subsidiaries	0	0	0	0
Changes in pension and other employee benefit accounts, net of taxes	0		0
Currency translation adjustment	(293)	(1,073)	289	(2,992)
Comprehensive (loss) income	427	(1,064)	1,664	(3,025)
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
Gain on bargain purchase		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 income, net	0	0	0	0
(Loss) income from continuing operations before income taxes	0	0	0	0
Income tax expense (benefit)	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	(15,789)	(64,308)	(1,351)	(65,528)
(Loss) income from continuing operations	(15,789)	(64,308)	(1,351)	(65,528)
(Loss) income from discontinued operations, net of taxes	0	0	0	0
Net (loss) income	(15,789)	(64,308)	(1,351)	(65,528)
Other comprehensive income (loss):
Other comprehensive (loss) income of subsidiaries	1,947	1,135	(1,061)	9,270
Changes in pension and other employee benefit accounts, net of taxes	0		0
Currency translation adjustment	0	0	0	0
Comprehensive (loss) income	$ (13,842)	$ (63,173)	$ (2,412)	$ (56,258)