Supplemental Guarantor Condensed Financial Information - Consolidated Statements of Operations (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 03, 2015	Mar. 28, 2014
Condensed Financial Statements, Captions [Line Items]
Net sales	$ 185,599	$ 169,904
Costs and Expense:
Cost of goods sold (excluding depreciation and amortization)	160,587	146,971
Selling and general (excluding depreciation and amortization)	18,537	18,776
Depreciation and amortization	7,499	8,202
Other operating charges	2,263	965
(Loss) income from operations	(3,287)	(5,010)
Equity in earnings (losses) of subsidiaries	0	0
Interest expense	(13,934)	(13,765)
Intercompany income (loss), net	0	0
Other (loss) income, net	(15,465)	196
Loss before income taxes	(32,686)	(18,579)
(Benefit from) provision for income taxes	(1,275)	693
Net loss	(31,411)	(19,272)
Parent
Condensed Financial Statements, Captions [Line Items]
Net sales	0	0
Costs and Expense:
Cost of goods sold (excluding depreciation and amortization)	0	0
Selling and general (excluding depreciation and amortization)	229	118
Depreciation and amortization	0	0
Other operating charges	0	0
(Loss) income from operations	(229)	(118)
Equity in earnings (losses) of subsidiaries	(31,182)	(19,154)
Interest expense	0	0
Intercompany income (loss), net	0	0
Other (loss) income, net	0	0
Loss before income taxes	(31,411)	(19,272)
(Benefit from) provision for income taxes	0	0
Net loss	(31,411)	(19,272)
Subsidiary Issuer
Condensed Financial Statements, Captions [Line Items]
Net sales	121,117	101,846
Costs and Expense:
Cost of goods sold (excluding depreciation and amortization)	106,810	91,773
Selling and general (excluding depreciation and amortization)	11,901	12,411
Depreciation and amortization	5,262	5,389
Other operating charges	1,753	542
(Loss) income from operations	(4,609)	(8,269)
Equity in earnings (losses) of subsidiaries	1,099	(1,692)
Interest expense	(13,545)	(13,407)
Intercompany income (loss), net	3,780	4,565
Other (loss) income, net	(17,479)	317
Loss before income taxes	(30,754)	(18,486)
(Benefit from) provision for income taxes	428	668
Net loss	(31,182)	(19,154)
Non-Guarantor
Condensed Financial Statements, Captions [Line Items]
Net sales	66,026	69,582
Costs and Expense:
Cost of goods sold (excluding depreciation and amortization)	55,321	56,722
Selling and general (excluding depreciation and amortization)	6,407	6,247
Depreciation and amortization	2,237	2,813
Other operating charges	510	423
(Loss) income from operations	1,551	3,377
Equity in earnings (losses) of subsidiaries	0	0
Interest expense	(389)	(358)
Intercompany income (loss), net	(3,780)	(4,565)
Other (loss) income, net	2,014	(121)
Loss before income taxes	(604)	(1,667)
(Benefit from) provision for income taxes	(1,703)	25
Net loss	1,099	(1,692)
Eliminations
Condensed Financial Statements, Captions [Line Items]
Net sales	(1,544)	(1,524)
Costs and Expense:
Cost of goods sold (excluding depreciation and amortization)	(1,544)	(1,524)
Selling and general (excluding depreciation and amortization)	0	0
Depreciation and amortization	0	0
Other operating charges	0	0
(Loss) income from operations	0	0
Equity in earnings (losses) of subsidiaries	30,083	20,846
Interest expense	0	0
Intercompany income (loss), net	0	0
Other (loss) income, net	0	0
Loss before income taxes	30,083	20,846
(Benefit from) provision for income taxes	0	0
Net loss	$ 30,083	$ 20,846