Supplemental Guarantor Condensed Financial Information - Consolidated Statements of Operations (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 28, 2013	Jun. 29, 2012	Jun. 28, 2013	Jun. 29, 2012
Condensed Financial Statements, Captions [Line Items]
Net sales	$ 229,861	$ 223,792	$ 402,406	$ 422,475
Costs and Expense:
Cost of goods sold (excluding depreciation and amortization)	190,461	185,135	339,631	351,700
Selling and general (excluding depreciation and amortization)	19,940	21,039	39,380	43,920
Depreciation and amortization	8,450	8,633	17,043	17,314
Other operating charges	1,126	920	3,900	1,762
Income (loss) from operations	9,884	8,065	2,452	7,779
Equity in earnings of subsidiaries	0	0	0	0
Interest expense	(13,854)	(13,861)	(27,452)	(27,397)
Intercompany (loss) income, net	0	0	0	0
Other income (loss), net	2,111	(8,863)	(4,234)	(2,819)
Loss before income taxes	(1,859)	(14,659)	(29,234)	(22,437)
Provision (benefit) for income taxes	(303)	933	438	1,275
Net loss	(1,556)	(15,592)	(29,672)	(23,712)
Parent
Condensed Financial Statements, Captions [Line Items]
Net sales	0	0	0	0
Costs and Expense:
Cost of goods sold (excluding depreciation and amortization)	0	0	0	0
Selling and general (excluding depreciation and amortization)	95	148	188	297
Depreciation and amortization	0	0	0	0
Other operating charges	0	0	0	0
Income (loss) from operations	(95)	(148)	(188)	(297)
Equity in earnings of subsidiaries	(1,461)	(15,444)	(29,484)	(23,415)
Interest expense	0	0	0	0
Intercompany (loss) income, net	0	0	0	0
Other income (loss), net	0	0	0	0
Loss before income taxes	(1,556)	(15,592)	(29,672)	(23,712)
Provision (benefit) for income taxes	0	0	0	0
Net loss	(1,556)	(15,592)	(29,672)	(23,712)
Subsidiary Issuer
Condensed Financial Statements, Captions [Line Items]
Net sales	158,120	152,875	263,434	275,317
Costs and Expense:
Cost of goods sold (excluding depreciation and amortization)	131,031	126,540	224,095	230,187
Selling and general (excluding depreciation and amortization)	13,669	14,516	26,730	29,434
Depreciation and amortization	5,558	5,532	11,133	11,084
Other operating charges	248	796	666	1,077
Income (loss) from operations	7,614	5,491	810	3,535
Equity in earnings of subsidiaries	(2,557)	(1,101)	(7,448)	(4,090)
Interest expense	(13,507)	(13,604)	(26,856)	(26,914)
Intercompany (loss) income, net	4,402	4,299	8,680	8,672
Other income (loss), net	2,529	(9,882)	(3,422)	(3,545)
Loss before income taxes	(1,519)	(14,797)	(28,236)	(22,342)
Provision (benefit) for income taxes	(58)	647	1,248	1,073
Net loss	(1,461)	(15,444)	(29,484)	(23,415)
Non-Guarantor
Condensed Financial Statements, Captions [Line Items]
Net sales	73,820	73,957	142,543	151,688
Costs and Expense:
Cost of goods sold (excluding depreciation and amortization)	61,509	61,635	119,107	126,043
Selling and general (excluding depreciation and amortization)	6,176	6,375	12,462	14,189
Depreciation and amortization	2,892	3,101	5,910	6,230
Other operating charges	878	124	3,234	685
Income (loss) from operations	2,365	2,722	1,830	4,541
Equity in earnings of subsidiaries	0	0	0	0
Interest expense	(347)	(257)	(596)	(483)
Intercompany (loss) income, net	(4,402)	(4,299)	(8,680)	(8,672)
Other income (loss), net	(418)	1,019	(812)	726
Loss before income taxes	(2,802)	(815)	(8,258)	(3,888)
Provision (benefit) for income taxes	(245)	286	(810)	202
Net loss	(2,557)	(1,101)	(7,448)	(4,090)
Eliminations
Condensed Financial Statements, Captions [Line Items]
Net sales	(2,079)	(3,040)	(3,571)	(4,530)
Costs and Expense:
Cost of goods sold (excluding depreciation and amortization)	(2,079)	(3,040)	(3,571)	(4,530)
Selling and general (excluding depreciation and amortization)	0	0	0	0
Depreciation and amortization	0	0	0	0
Other operating charges	0	0	0	0
Income (loss) from operations	0	0	0	0
Equity in earnings of subsidiaries	4,018	16,545	36,932	27,505
Interest expense	0	0	0	0
Intercompany (loss) income, net	0	0	0	0
Other income (loss), net	0	0	0	0
Loss before income taxes	4,018	16,545	36,932	27,505
Provision (benefit) for income taxes	0	0	0	0
Net loss	$ 4,018	$ 16,545	$ 36,932	$ 27,505