Supplemental Guarantor Condensed Financial Information - Consolidated Statements of Operations (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 26, 2014	Sep. 27, 2013	Sep. 26, 2014	Sep. 27, 2013
Condensed Financial Statements, Captions [Line Items]
Net sales	$ 239,942	$ 227,835	$ 642,836	$ 630,241
Costs and Expense:
Cost of goods sold (excluding depreciation and amortization)	202,160	188,792	542,208	528,423
Selling and general (excluding depreciation and amortization)	17,413	20,387	55,379	59,767
Depreciation and amortization	8,142	8,514	24,595	25,557
Other operating charges	1,051	1,455	4,357	5,355
Income (loss) from operations	11,176	8,687	16,297	11,139
Equity in earnings (losses) of subsidiaries	0	0	0	0
Interest expense	(13,895)	(13,805)	(41,574)	(41,257)
Intercompany income (loss), net	0	0	0	0
Other (loss) income, net	(14,056)	8,295	(14,376)	4,061
Income (loss) before income taxes	(16,775)	3,177	(39,653)	(26,057)
(Benefit from) provision for income taxes	(369)	(13,082)	(859)	(12,644)
Net (loss) income	(16,406)	16,259	(38,794)	(13,413)
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)	102	325	322	513
Depreciation and amortization	0	0	0	0
Other operating charges	0	0	0	0
Income (loss) from operations	(102)	(325)	(322)	(513)
Equity in earnings (losses) of subsidiaries	(16,304)	16,584	(38,472)	(12,900)
Interest expense	0	0	0	0
Intercompany income (loss), net	0	0	0	0
Other (loss) income, net	0	0	0	0
Income (loss) before income taxes	(16,406)	16,259	(38,794)	(13,413)
(Benefit from) provision for income taxes	0	0	0	0
Net (loss) income	(16,406)	16,259	(38,794)	(13,413)
Subsidiary Issuer
Condensed Financial Statements, Captions [Line Items]
Net sales	177,682	165,866	441,341	429,300
Costs and Expense:
Cost of goods sold (excluding depreciation and amortization)	150,361	137,171	376,504	361,266
Selling and general (excluding depreciation and amortization)	11,722	13,686	36,200	40,416
Depreciation and amortization	5,406	5,579	16,198	16,712
Other operating charges	795	155	3,031	821
Income (loss) from operations	9,398	9,275	9,408	10,085
Equity in earnings (losses) of subsidiaries	(1,471)	(4,171)	(4,455)	(11,619)
Interest expense	(13,571)	(13,528)	(40,520)	(40,384)
Intercompany income (loss), net	4,486	4,478	13,825	13,158
Other (loss) income, net	(15,023)	8,313	(15,876)	4,891
Income (loss) before income taxes	(16,181)	4,367	(37,618)	(23,869)
(Benefit from) provision for income taxes	123	(12,217)	854	(10,969)
Net (loss) income	(16,304)	16,584	(38,472)	(12,900)
Non-Guarantor
Condensed Financial Statements, Captions [Line Items]
Net sales	64,674	64,365	207,434	206,908
Costs and Expense:
Cost of goods sold (excluding depreciation and amortization)	54,213	54,017	171,643	173,124
Selling and general (excluding depreciation and amortization)	5,589	6,376	18,857	18,838
Depreciation and amortization	2,736	2,935	8,397	8,845
Other operating charges	256	1,300	1,326	4,534
Income (loss) from operations	1,880	(263)	7,211	1,567
Equity in earnings (losses) of subsidiaries	0	0	0	0
Interest expense	(324)	(277)	(1,054)	(873)
Intercompany income (loss), net	(4,486)	(4,478)	(13,825)	(13,158)
Other (loss) income, net	967	(18)	1,500	(830)
Income (loss) before income taxes	(1,963)	(5,036)	(6,168)	(13,294)
(Benefit from) provision for income taxes	(492)	(865)	(1,713)	(1,675)
Net (loss) income	(1,471)	(4,171)	(4,455)	(11,619)
Eliminations
Condensed Financial Statements, Captions [Line Items]
Net sales	(2,414)	(2,396)	(5,939)	(5,967)
Costs and Expense:
Cost of goods sold (excluding depreciation and amortization)	(2,414)	(2,396)	(5,939)	(5,967)
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 (losses) of subsidiaries	17,775	(12,413)	42,927	24,519
Interest expense	0	0	0	0
Intercompany income (loss), net	0	0	0	0
Other (loss) income, net	0	0	0	0
Income (loss) before income taxes	17,775	(12,413)	42,927	24,519
(Benefit from) provision for income taxes	0	0	0	0
Net (loss) income	$ 17,775	$ (12,413)	$ 42,927	$ 24,519