Condensed Consolidating Financial Information (Condensed Consolidating Statement of Operations and Comprehensive Income (Loss)) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 27, 2014	Sep. 27, 2014	Jun. 28, 2014	Mar. 29, 2014	Dec. 28, 2013	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Dec. 27, 2014	Dec. 28, 2013	Dec. 29, 2012
Condensed Financial Statements, Captions [Line Items]
Net sales	$ 498,935	$ 480,576	$ 479,410	$ 490,119	$ 509,873	$ 442,781	$ 406,540	$ 418,614	$ 1,949,040	$ 1,777,808	$ 1,738,293
Cost of sales									1,653,513	1,485,931	1,417,147
Selling, general and administrative expenses									217,530	206,085	182,980
Amortization of intangible assets									11,781	9,962	9,881
Restructuring and other charges									22,458	13,100	27,100
Impairment of intangible assets									0	33,367	0
Operating income	11,009	9,330	13,347	10,072	(15,681)	16,524	16,842	11,678	43,758	29,363	101,185
Gain on bargain purchase									0	(17,262)	0
Interest expense, net									106,798	112,677	114,755
Intercompany interest (income) expense									0	0	0
Loss on early extinguishment of debt, net									27,449	11,324	12,487
Other expense (income), net									(7,004)	(5,602)	(1,249)
Loss from continuing operations before income taxes									(83,485)	(71,774)	(24,808)
Income tax (benefit) expense									2,834	13,753	55,720
Income (loss) from continuing operations before equity in income (loss) of subsidiaries									(86,319)	(85,527)	(80,528)
Equity in income (loss) of subsidiaries									0	0	0
Loss from continuing operations	(19,437)	(10,794)	(39,301)	(16,787)	(59,468)	13,427	(18,996)	(20,490)	(86,319)	(85,527)	(80,528)
Income from discontinued operations, net of taxes	938	(99)	664	953	1,791	13,492	113	1,345	2,456	16,741	641
Net loss	(18,499)	(10,893)	(38,637)	(15,834)	(57,677)	26,919	(18,883)	(19,145)	(83,863)	(68,786)	(79,887)
Other comprehensive income (loss):
Other comprehensive income (loss) of subsidiaries									0	0	0
Changes in pension and other employee benefit accounts, net of taxes									(56,576)	31,430	(7,986)
Currency translation adjustment									(1,321)	(4,529)	665
Comprehensive loss									(141,760)	(41,885)	(87,208)
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Net sales									0	0	0
Cost of sales									0	0	0
Selling, general and administrative expenses									0	0	0
Amortization of intangible assets									0	0	0
Restructuring and other charges									0	0	0
Impairment of intangible assets										0
Operating income									0	0	0
Gain on bargain purchase										0
Interest expense, net									0	0	0
Intercompany interest (income) expense									0	0	0
Loss on early extinguishment of debt, net									0	0	0
Other expense (income), net									0	0	0
Loss from continuing operations before income taxes									0	0	0
Income tax (benefit) expense									0	0	0
Income (loss) from continuing operations before equity in income (loss) of subsidiaries									0	0	0
Equity in income (loss) of subsidiaries									(83,863)	(68,786)	(79,887)
Loss from continuing operations									(83,863)	(68,786)	(79,887)
Income from discontinued operations, net of taxes									0	0	0
Net loss									(83,863)	(68,786)	(79,887)
Other comprehensive income (loss):
Other comprehensive income (loss) of subsidiaries									(57,897)	26,901	(7,321)
Changes in pension and other employee benefit accounts, net of taxes									0	0	0
Currency translation adjustment									0	0	0
Comprehensive loss									(141,760)	(41,885)	(87,208)
Subsidiary Issuer [Member]
Condensed Financial Statements, Captions [Line Items]
Net sales									932,099	762,810	684,257
Cost of sales									817,761	660,679	576,286
Selling, general and administrative expenses									128,806	119,046	101,704
Amortization of intangible assets									703	602	582
Restructuring and other charges									18,560	7,744	5,917
Impairment of intangible assets										0
Operating income									(33,731)	(25,261)	(232)
Gain on bargain purchase										(17,262)
Interest expense, net									106,276	112,232	114,164
Intercompany interest (income) expense									(1,107)	(1,203)	(1,476)
Loss on early extinguishment of debt, net									27,449	11,324	12,487
Other expense (income), net									(106)	(2,238)	(1,125)
Loss from continuing operations before income taxes									(166,243)	(128,114)	(124,282)
Income tax (benefit) expense									694	28,109	31,623
Income (loss) from continuing operations before equity in income (loss) of subsidiaries									(166,937)	(156,223)	(155,905)
Equity in income (loss) of subsidiaries									81,935	78,447	68,896
Loss from continuing operations									(85,002)	(77,776)	(87,009)
Income from discontinued operations, net of taxes									1,139	8,990	7,122
Net loss									(83,863)	(68,786)	(79,887)
Other comprehensive income (loss):
Other comprehensive income (loss) of subsidiaries									(4,952)	(1,754)	(64)
Changes in pension and other employee benefit accounts, net of taxes									(52,945)	28,655	(7,257)
Currency translation adjustment									0	0	0
Comprehensive loss									(141,760)	(41,885)	(87,208)
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Net sales									1,004,246	999,441	1,038,793
Cost of sales									827,575	812,034	827,342
Selling, general and administrative expenses									87,071	86,072	80,511
Amortization of intangible assets									10,590	8,829	8,777
Restructuring and other charges									3,898	5,342	21,087
Impairment of intangible assets										33,367
Operating income									75,112	53,797	101,076
Gain on bargain purchase										0
Interest expense, net									522	445	607
Intercompany interest (income) expense									1,107	1,203	1,404
Loss on early extinguishment of debt, net									0	0	0
Other expense (income), net									(6,776)	(3,106)	46
Loss from continuing operations before income taxes									80,259	55,255	99,019
Income tax (benefit) expense									1,515	(15,023)	24,503
Income (loss) from continuing operations before equity in income (loss) of subsidiaries									78,744	70,278	74,516
Equity in income (loss) of subsidiaries									1,874	418	861
Loss from continuing operations									80,618	70,696	75,377
Income from discontinued operations, net of taxes									1,317	7,751	(6,481)
Net loss									81,935	78,447	68,896
Other comprehensive income (loss):
Other comprehensive income (loss) of subsidiaries									(407)	(2,704)	(589)
Changes in pension and other employee benefit accounts, net of taxes									(3,631)	2,775	(729)
Currency translation adjustment									(914)	(1,825)	1,254
Comprehensive loss									76,983	76,693	68,832
Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Net sales									12,695	15,557	15,243
Cost of sales									8,177	13,218	13,519
Selling, general and administrative expenses									1,653	967	765
Amortization of intangible assets									488	531	522
Restructuring and other charges									0	14	96
Impairment of intangible assets										0
Operating income									2,377	827	341
Gain on bargain purchase										0
Interest expense, net									0	0	(16)
Intercompany interest (income) expense									0	0	72
Loss on early extinguishment of debt, net									0	0	0
Other expense (income), net									(122)	(258)	(170)
Loss from continuing operations before income taxes									2,499	1,085	455
Income tax (benefit) expense									625	667	(406)
Income (loss) from continuing operations before equity in income (loss) of subsidiaries									1,874	418	861
Equity in income (loss) of subsidiaries									0	0	0
Loss from continuing operations									1,874	418	861
Income from discontinued operations, net of taxes									0	0	0
Net loss									1,874	418	861
Other comprehensive income (loss):
Other comprehensive income (loss) of subsidiaries									0	0	0
Changes in pension and other employee benefit accounts, net of taxes									0	0	0
Currency translation adjustment									(407)	(2,704)	(589)
Comprehensive loss									1,467	(2,286)	272
Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Net sales									0	0	0
Cost of sales									0	0	0
Selling, general and administrative expenses									0	0	0
Amortization of intangible assets									0	0	0
Restructuring and other charges									0	0	0
Impairment of intangible assets										0
Operating income									0	0	0
Gain on bargain purchase										0
Interest expense, net									0	0	0
Intercompany interest (income) expense									0	0	0
Loss on early extinguishment of debt, net									0	0	0
Other expense (income), net									0	0	0
Loss from continuing operations before income taxes									0	0	0
Income tax (benefit) expense									0	0	0
Income (loss) from continuing operations before equity in income (loss) of subsidiaries									0	0	0
Equity in income (loss) of subsidiaries									54	(10,079)	10,130
Loss from continuing operations									54	(10,079)	10,130
Income from discontinued operations, net of taxes									0	0	0
Net loss									54	(10,079)	10,130
Other comprehensive income (loss):
Other comprehensive income (loss) of subsidiaries									63,256	(22,443)	7,974
Changes in pension and other employee benefit accounts, net of taxes									0	0	0
Currency translation adjustment									0	0	0
Comprehensive loss									$ 63,310	$ (32,522)	$ 18,104