Condensed Consolidating Financial Information (Condensed Consolidating Statement of Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2016	Sep. 26, 2015	Oct. 01, 2016	Sep. 26, 2015
Condensed Financial Statements, Captions [Line Items]
Net sales	$ 405,955	$ 419,783	$ 1,242,757	$ 1,262,819
Cost of sales	335,733	347,409	1,033,122	1,050,004
Selling, general and administrative expenses	45,560	45,394	137,533	136,559
Amortization of intangible assets	1,375	1,981	4,361	5,756
Restructuring and other charges	2,414	5,483	8,284	11,529
Operating income	20,873	19,516	59,457	58,971
Interest expense, net	20,318	25,095	65,925	76,001
Intercompany interest (income) expense	0	0	0	0
(Gain) loss on early extinguishment of debt, net	(7,442)	0	(80,328)	559
Other (income) expense, net	(1,735)	(1,332)	(2,825)	(773)
Income (loss) from continuing operations before income taxes	9,732	(4,247)	76,685	(16,816)
Income tax expense	987	(685)	4,060	(1,720)
(Loss) income from continuing operations before equity in income (loss) of subsidiaries	8,745	(3,562)	72,625	(15,096)
Equity in income (loss) of subsidiaries	0	0	0	0
Income (loss) from continuing operations	8,745	(3,562)	72,625	(15,096)
Income (loss) from discontinued operations, net of taxes	686	319	(4,435)	1,769
Net income (loss)	9,431	(3,243)	68,190	(13,327)
Other comprehensive income (loss):
Other comprehensive income (loss) of subsidiaries	0	0	0	0
Changes in pension and other employee benefit accounts, net of taxes	2,507	1,433	7,467	4,117
Currency translation adjustment, net	557	(1,893)	2,142	(3,132)
Total other comprehensive income	3,064	(460)	9,609	985
Comprehensive income (loss)	12,495	(3,703)	77,799	(12,342)
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Net sales	0	0	0	0
Cost of sales	0	0	0	0
Selling, general and administrative expenses	0	0	0	0
Amortization of intangible assets	0	0	0	0
Restructuring and other charges	0	0	0	0
Operating income	0	0	0	0
Interest expense, net	0	0	0	0
Intercompany interest (income) expense	0	0	0	0
(Gain) loss on early extinguishment of debt, net	0		0	0
Other (income) expense, net	0	0	0	0
Income (loss) from continuing operations before income taxes	0	0	0	0
Income tax expense	0	0	0	0
(Loss) income from continuing operations before equity in income (loss) of subsidiaries	0	0	0	0
Equity in income (loss) of subsidiaries	9,431	(3,243)	68,190	(13,327)
Income (loss) from continuing operations	9,431	(3,243)	68,190	(13,327)
Income (loss) from discontinued operations, net of taxes	0	0	0	0
Net income (loss)	9,431	(3,243)	68,190	(13,327)
Other comprehensive income (loss):
Other comprehensive income (loss) of subsidiaries	3,064	(460)	9,609	985
Changes in pension and other employee benefit accounts, net of taxes	0	0	0	0
Currency translation adjustment, net	0	0	0	0
Total other comprehensive income	3,064	(460)	9,609	985
Comprehensive income (loss)	12,495	(3,703)	77,799	(12,342)
Subsidiary Issuer [Member]
Condensed Financial Statements, Captions [Line Items]
Net sales	211,525	218,392	654,350	653,778
Cost of sales	184,466	187,614	575,709	561,734
Selling, general and administrative expenses	27,855	29,511	85,229	87,595
Amortization of intangible assets	148	239	452	543
Restructuring and other charges	2,581	4,875	6,358	9,842
Operating income	(3,525)	(3,847)	(13,398)	(5,936)
Interest expense, net	20,272	25,046	65,779	75,833
Intercompany interest (income) expense	(249)	(214)	(740)	(765)
(Gain) loss on early extinguishment of debt, net	(7,442)		(80,328)	559
Other (income) expense, net	(1,877)	(1,228)	(877)	(435)
Income (loss) from continuing operations before income taxes	(14,229)	(27,451)	2,768	(81,128)
Income tax expense	774	(1,597)	2,827	(4,194)
(Loss) income from continuing operations before equity in income (loss) of subsidiaries	(15,003)	(25,854)	(59)	(76,934)
Equity in income (loss) of subsidiaries	24,927	22,810	70,889	63,807
Income (loss) from continuing operations	9,924	(3,044)	70,830	(13,127)
Income (loss) from discontinued operations, net of taxes	(493)	(199)	(2,640)	(200)
Net income (loss)	9,431	(3,243)	68,190	(13,327)
Other comprehensive income (loss):
Other comprehensive income (loss) of subsidiaries	363	(1,641)	2,401	(2,880)
Changes in pension and other employee benefit accounts, net of taxes	2,701	1,181	7,208	3,865
Currency translation adjustment, net	0	0	0	0
Total other comprehensive income	3,064	(460)	9,609	985
Comprehensive income (loss)	12,495	(3,703)	77,799	(12,342)
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Net sales	193,945	200,548	587,116	605,967
Cost of sales	151,267	159,795	457,413	487,539
Selling, general and administrative expenses	17,526	15,707	51,747	48,424
Amortization of intangible assets	1,116	1,622	3,576	4,865
Restructuring and other charges	(167)	608	1,926	1,687
Operating income	24,203	22,816	72,454	63,452
Interest expense, net	46	49	146	168
Intercompany interest (income) expense	249	214	740	765
(Gain) loss on early extinguishment of debt, net	0		0	0
Other (income) expense, net	100	64	(1,848)	(106)
Income (loss) from continuing operations before income taxes	23,808	22,489	73,416	62,625
Income tax expense	160	666	402	1,976
(Loss) income from continuing operations before equity in income (loss) of subsidiaries	23,648	21,823	73,014	60,649
Equity in income (loss) of subsidiaries	163	441	715	982
Income (loss) from continuing operations	23,811	22,264	73,729	61,631
Income (loss) from discontinued operations, net of taxes	1,116	546	(2,840)	2,176
Net income (loss)	24,927	22,810	70,889	63,807
Other comprehensive income (loss):
Other comprehensive income (loss) of subsidiaries	213	(872)	140	(890)
Changes in pension and other employee benefit accounts, net of taxes	(194)	252	259	252
Currency translation adjustment, net	344	(1,021)	2,002	(2,242)
Total other comprehensive income	363	(1,641)	2,401	(2,880)
Comprehensive income (loss)	25,290	21,169	73,290	60,927
Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Net sales	485	843	1,291	3,074
Cost of sales	0	0	0	731
Selling, general and administrative expenses	179	176	557	540
Amortization of intangible assets	111	120	333	348
Restructuring and other charges	0	0	0	0
Operating income	195	547	401	1,455
Interest expense, net	0	0	0	0
Intercompany interest (income) expense	0	0	0	0
(Gain) loss on early extinguishment of debt, net	0		0	0
Other (income) expense, net	42	(168)	(100)	(232)
Income (loss) from continuing operations before income taxes	153	715	501	1,687
Income tax expense	53	246	831	498
(Loss) income from continuing operations before equity in income (loss) of subsidiaries	100	469	(330)	1,189
Equity in income (loss) of subsidiaries	0	0	0	0
Income (loss) from continuing operations	100	469	(330)	1,189
Income (loss) from discontinued operations, net of taxes	63	(28)	1,045	(207)
Net income (loss)	163	441	715	982
Other comprehensive income (loss):
Other comprehensive income (loss) of subsidiaries	0	0	0	0
Changes in pension and other employee benefit accounts, net of taxes	0	0	0	0
Currency translation adjustment, net	213	(872)	140	(890)
Total other comprehensive income	213	(872)	140	(890)
Comprehensive income (loss)	376	(431)	855	92
Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Net sales	0	0	0	0
Cost of sales	0	0	0	0
Selling, general and administrative expenses	0	0	0	0
Amortization of intangible assets	0	0	0	0
Restructuring and other charges	0	0	0	0
Operating income	0	0	0	0
Interest expense, net	0	0	0	0
Intercompany interest (income) expense	0	0	0	0
(Gain) loss on early extinguishment of debt, net	0		0	0
Other (income) expense, net	0	0	0	0
Income (loss) from continuing operations before income taxes	0	0	0	0
Income tax expense	0	0	0	0
(Loss) income from continuing operations before equity in income (loss) of subsidiaries	0	0	0	0
Equity in income (loss) of subsidiaries	(34,521)	(20,008)	(139,794)	(51,462)
Income (loss) from continuing operations	(34,521)	(20,008)	(139,794)	(51,462)
Income (loss) from discontinued operations, net of taxes	0	0	0	0
Net income (loss)	(34,521)	(20,008)	(139,794)	(51,462)
Other comprehensive income (loss):
Other comprehensive income (loss) of subsidiaries	(3,640)	2,973	(12,150)	2,785
Changes in pension and other employee benefit accounts, net of taxes	0	0	0	0
Currency translation adjustment, net	0	0	0	0
Total other comprehensive income	(3,640)	2,973	(12,150)	2,785
Comprehensive income (loss)	$ (38,161)	$ (17,035)	$ (151,944)	$ (48,677)