Condensed Consolidating Financial Information (Condensed Consolidating Statement of Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 02, 2016	Jun. 27, 2015	Jul. 02, 2016	Jun. 27, 2015
Condensed Financial Statements, Captions [Line Items]
Net sales	$ 404,041	$ 413,359	$ 836,802	$ 843,036
Cost of sales	335,478	343,812	697,389	702,595
Selling, general and administrative expenses	44,734	44,008	91,973	91,165
Amortization of intangible assets	1,379	1,907	2,986	3,775
Restructuring and other charges	880	1,977	5,870	6,046
Operating income	21,570	21,655	38,584	39,455
Interest expense, net	21,512	25,247	45,607	50,906
Intercompany interest (income) expense	0	0	0	0
(Gain) loss on early extinguishment of debt, net	(51,273)	126	(72,886)	559
Other expense (income), net	(1,644)	391	(1,090)	559
Income (loss) from continuing operations before income taxes	52,975	(4,109)	66,953	(12,569)
Income tax expense	2,115	(754)	3,073	(1,035)
Income (loss) from continuing operations before equity in income (loss) of subsidiaries	50,860	(3,355)	63,880	(11,534)
Equity in income (loss) of subsidiaries	0	0	0	0
Income (loss) from continuing operations	50,860	(3,355)	63,880	(11,534)
(Loss) income from discontinued operations, net of taxes	(3,304)	950	(5,121)	1,450
Net income (loss)	47,556	(2,405)	58,759	(10,084)
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	2,480	1,342	4,960	2,684
Currency translation adjustment, net	(157)	91	1,585	(1,239)
Total other comprehensive income	2,323	1,433	6,545	1,445
Comprehensive income (loss)	49,879	(972)	65,304	(8,639)
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	0
Other expense (income), net	0	0	0	0
Income (loss) from continuing operations before income taxes	0	0	0	0
Income tax expense	0	0	0	0
Income (loss) from continuing operations before equity in income (loss) of subsidiaries	0	0	0	0
Equity in income (loss) of subsidiaries	47,556	(2,405)	58,759	(10,084)
Income (loss) from continuing operations	47,556	(2,405)	58,759	(10,084)
(Loss) income from discontinued operations, net of taxes	0	0	0	0
Net income (loss)	47,556	(2,405)	58,759	(10,084)
Other comprehensive income (loss):
Other comprehensive income (loss) of subsidiaries	2,323	1,433	6,545	1,445
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	2,323	1,433	6,545	1,445
Comprehensive income (loss)	49,879	(972)	65,304	(8,639)
Subsidiary Issuer [Member]
Condensed Financial Statements, Captions [Line Items]
Net sales	211,727	211,534	442,825	435,386
Cost of sales	187,912	183,257	391,243	374,120
Selling, general and administrative expenses	28,099	27,969	57,374	58,084
Amortization of intangible assets	152	152	304	304
Restructuring and other charges	759	1,520	3,777	4,967
Operating income	(5,195)	(1,364)	(9,873)	(2,089)
Interest expense, net	21,459	25,195	45,507	50,787
Intercompany interest (income) expense	(246)	(277)	(491)	(551)
(Gain) loss on early extinguishment of debt, net	(51,273)	126	(72,886)	559
Other expense (income), net	400	499	1,000	793
Income (loss) from continuing operations before income taxes	24,465	(26,907)	16,997	(53,677)
Income tax expense	1,203	(1,363)	2,053	(2,597)
Income (loss) from continuing operations before equity in income (loss) of subsidiaries	23,262	(25,544)	14,944	(51,080)
Equity in income (loss) of subsidiaries	24,164	23,139	45,962	40,997
Income (loss) from continuing operations	47,426	(2,405)	60,906	(10,083)
(Loss) income from discontinued operations, net of taxes	130	0	(2,147)	(1)
Net income (loss)	47,556	(2,405)	58,759	(10,084)
Other comprehensive income (loss):
Other comprehensive income (loss) of subsidiaries	(71)	91	2,038	(1,239)
Changes in pension and other employee benefit accounts, net of taxes	2,394	1,342	4,507	2,684
Currency translation adjustment, net	0	0	0	0
Total other comprehensive income	2,323	1,433	6,545	1,445
Comprehensive income (loss)	49,879	(972)	65,304	(8,639)
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Net sales	191,693	201,033	393,171	405,419
Cost of sales	147,566	160,434	306,146	327,744
Selling, general and administrative expenses	16,439	15,857	34,221	32,717
Amortization of intangible assets	1,116	1,638	2,460	3,243
Restructuring and other charges	121	457	2,093	1,079
Operating income	26,451	22,647	48,251	40,636
Interest expense, net	53	52	100	119
Intercompany interest (income) expense	246	277	491	551
(Gain) loss on early extinguishment of debt, net	0	0	0	0
Other expense (income), net	(1,962)	(9)	(1,948)	(170)
Income (loss) from continuing operations before income taxes	28,114	22,327	49,608	40,136
Income tax expense	120	444	242	1,310
Income (loss) from continuing operations before equity in income (loss) of subsidiaries	27,994	21,883	49,366	38,826
Equity in income (loss) of subsidiaries	(1,091)	(63)	552	541
Income (loss) from continuing operations	26,903	21,820	49,918	39,367
(Loss) income from discontinued operations, net of taxes	(2,739)	1,319	(3,956)	1,630
Net income (loss)	24,164	23,139	45,962	40,997
Other comprehensive income (loss):
Other comprehensive income (loss) of subsidiaries	(250)	(371)	(73)	(18)
Changes in pension and other employee benefit accounts, net of taxes	86	0	453	0
Currency translation adjustment, net	93	462	1,658	(1,221)
Total other comprehensive income	(71)	91	2,038	(1,239)
Comprehensive income (loss)	24,093	23,230	48,000	39,758
Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Net sales	621	792	806	2,231
Cost of sales	0	121	0	731
Selling, general and administrative expenses	196	182	378	364
Amortization of intangible assets	111	117	222	228
Restructuring and other charges	0	0	0	0
Operating income	314	372	206	908
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	0
Other expense (income), net	(82)	(99)	(142)	(64)
Income (loss) from continuing operations before income taxes	396	471	348	972
Income tax expense	792	165	778	252
Income (loss) from continuing operations before equity in income (loss) of subsidiaries	(396)	306	(430)	720
Equity in income (loss) of subsidiaries	0	0	0	0
Income (loss) from continuing operations	(396)	306	(430)	720
(Loss) income from discontinued operations, net of taxes	(695)	(369)	982	(179)
Net income (loss)	(1,091)	(63)	552	541
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	(250)	(371)	(73)	(18)
Total other comprehensive income	(250)	(371)	(73)	(18)
Comprehensive income (loss)	(1,341)	(434)	479	523
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	0
Other expense (income), net	0	0	0	0
Income (loss) from continuing operations before income taxes	0	0	0	0
Income tax expense	0	0	0	0
Income (loss) from continuing operations before equity in income (loss) of subsidiaries	0	0	0	0
Equity in income (loss) of subsidiaries	(70,629)	(20,671)	(105,273)	(31,454)
Income (loss) from continuing operations	(70,629)	(20,671)	(105,273)	(31,454)
(Loss) income from discontinued operations, net of taxes	0	0	0	0
Net income (loss)	(70,629)	(20,671)	(105,273)	(31,454)
Other comprehensive income (loss):
Other comprehensive income (loss) of subsidiaries	(2,002)	(1,153)	(8,510)	(188)
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	(2,002)	(1,153)	(8,510)	(188)
Comprehensive income (loss)	$ (72,631)	$ (21,824)	$ (113,783)	$ (31,642)