Consolidated Statements of Operations (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 26, 2014	Jun. 27, 2014	Mar. 28, 2014	Dec. 31, 2013	Sep. 27, 2013	Jun. 28, 2013	Mar. 29, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Net sales	$ 211,909	$ 239,942	$ 232,990	$ 169,904	$ 196,431	$ 227,835	$ 229,861	$ 172,545	$ 854,745	$ 826,672	$ 837,140
Costs and expenses:
Cost of goods sold (excluding depreciation and amortization)	183,540	202,160	193,077	146,971	171,539	188,792	190,461	149,170	725,748	699,962	701,045
Selling and general (excluding depreciation and amortization)									71,620	75,428	83,492
Depreciation and amortization	7,833	8,142	8,251	8,202	9,542	8,514	8,450	8,593	32,428	35,099	34,784
Other operating charges									6,359	9,165	6,425
Multiemployer pension withdrawal									0	0	39
Income from operations	2,293	11,176	10,131	(5,010)	(4,121)	8,687	9,884	(7,432)	18,590	7,018	11,355
Interest expense									(55,518)	(54,078)	(54,858)
Other (loss) income, net									(23,153)	7,404	5,012
Loss before income taxes	(20,428)	(16,775)	(4,299)	(18,579)	(13,599)	3,177	(1,859)	(27,375)	(60,081)	(39,656)	(38,491)
Provision (benefit) for income taxes									(802)	(14,761)	(1,723)
Net loss	$ (20,485)	$ (16,406)	$ (3,116)	$ (19,272)	$ (11,482)	$ 16,259	$ (1,556)	$ (28,116)	$ (59,279)	$ (24,895)	$ (36,768)