Subsidiary Guarantors Condensed Consolidating Statement of Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 04, 2015	Jun. 28, 2014	Jul. 04, 2015	Jun. 28, 2014
Condensed Financial Statements, Captions [Line Items]
Net sales	$ 331,249	$ 319,875	$ 551,615	$ 516,464
Cost of sales	250,234	247,862	428,697	410,036
Gross profit	81,015	72,013	122,918	106,428
Selling, general and administrative expenses	62,166	60,266	120,636	118,931
Income from operations	18,849	11,747	2,282	(12,503)
Interest expense, net	21,156	20,759	41,862	41,079
Foreign currency loss	601	278	1,117	616
Income (loss) before income taxes	(2,908)	(9,290)	(40,697)	(54,198)
Income tax expense (benefit)	2,230	1,318	2,763	2,759
(Loss) income before equity income (loss) from subsidiaries	(5,138)	(10,608)	(43,460)	(56,957)
Equity income (loss) from subsidiaries	0	0	0	0
Net income (loss)	(5,138)	(10,608)	(43,460)	(56,957)
Other comprehensive income (loss):
Pension and other postretirement benefit adjustments, net of tax	151	5	299	8
Foreign currency translation adjustments, net of tax	(1,379)	10,211	(12,965)	1,157
Total comprehensive (loss) income	(6,366)	(392)	(56,126)	(55,792)
Company
Condensed Financial Statements, Captions [Line Items]
Net sales	262,272	251,215	441,910	408,154
Cost of sales	201,659	201,020	350,626	335,338
Gross profit	60,613	50,195	91,284	72,816
Selling, general and administrative expenses	49,194	48,100	96,851	95,899
Income from operations	11,419	2,095	(5,567)	(23,083)
Interest expense, net	19,276	20,292	38,064	40,264
Foreign currency loss	0	0	0	0
Income (loss) before income taxes	(7,857)	(18,197)	(43,631)	(63,347)
Income tax expense (benefit)	179	(378)	905	1,256
(Loss) income before equity income (loss) from subsidiaries	(8,036)	(17,819)	(44,536)	(64,603)
Equity income (loss) from subsidiaries	2,898	7,211	1,076	7,646
Net income (loss)	(5,138)	(10,608)	(43,460)	(56,957)
Other comprehensive income (loss):
Pension and other postretirement benefit adjustments, net of tax	(151)	5	299	8
Foreign currency translation adjustments, net of tax	(1,379)	10,211	(12,965)	1,157
Total comprehensive (loss) income	(6,366)	(392)	(56,126)	(55,792)
Co-Issuer
Condensed Financial Statements, Captions [Line Items]
Net sales	0	0	0	0
Cost of sales	0	0	0	0
Gross profit	0	0	0	0
Selling, general and administrative expenses	0	0	0	0
Income from operations	0	0	0	0
Interest expense, net	0	0	0	0
Foreign currency loss	0	0	0	0
Income (loss) before income taxes	0	0	0	0
Income tax expense (benefit)	0	0	0	0
(Loss) income before equity income (loss) from subsidiaries	0	0	0	0
Equity income (loss) from subsidiaries	0	0	0	0
Net income (loss)	0	0	0	0
Other comprehensive income (loss):
Pension and other postretirement benefit adjustments, net of tax	0	0	0	0
Foreign currency translation adjustments, net of tax	0	0	0	0
Total comprehensive (loss) income	0	0	0	0
Subsidiary Guarantors
Condensed Financial Statements, Captions [Line Items]
Net sales	42,578	45,778	72,740	76,440
Cost of sales	41,001	42,595	69,807	71,545
Gross profit	1,577	3,183	2,933	4,895
Selling, general and administrative expenses	2,526	1,104	3,370	2,046
Income from operations	(949)	2,079	(437)	2,849
Interest expense, net	1,662	0	3,323	1
Foreign currency loss	0	0	0	0
Income (loss) before income taxes	(2,611)	2,079	(3,760)	2,848
Income tax expense (benefit)	53	(36)	77	(63)
(Loss) income before equity income (loss) from subsidiaries	(2,664)	2,115	(3,837)	2,911
Equity income (loss) from subsidiaries	5,562	5,096	4,913	4,735
Net income (loss)	2,898	7,211	1,076	7,646
Other comprehensive income (loss):
Pension and other postretirement benefit adjustments, net of tax	(60)	13	118	25
Foreign currency translation adjustments, net of tax	(1,379)	10,211	(12,965)	1,157
Total comprehensive (loss) income	1,579	17,435	(11,771)	8,828
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net sales	77,477	79,125	124,725	123,819
Cost of sales	58,652	60,490	96,024	95,102
Gross profit	18,825	18,635	28,701	28,717
Selling, general and administrative expenses	10,446	11,062	20,415	20,986
Income from operations	8,379	7,573	8,286	7,731
Interest expense, net	218	467	475	814
Foreign currency loss	601	278	1,117	616
Income (loss) before income taxes	7,560	6,828	6,694	6,301
Income tax expense (benefit)	1,998	1,732	1,781	1,566
(Loss) income before equity income (loss) from subsidiaries	5,562	5,096	4,913	4,735
Equity income (loss) from subsidiaries	0	0	0	0
Net income (loss)	5,562	5,096	4,913	4,735
Other comprehensive income (loss):
Pension and other postretirement benefit adjustments, net of tax	(50)	14	98	28
Foreign currency translation adjustments, net of tax	(1,379)	10,211	(12,965)	1,157
Total comprehensive (loss) income	4,233	15,321	(7,954)	5,920
Reclassification/Eliminations
Condensed Financial Statements, Captions [Line Items]
Net sales	(51,078)	(56,243)	(87,760)	(91,949)
Cost of sales	(51,078)	(56,243)	(87,760)	(91,949)
Gross profit	0	0	0	0
Selling, general and administrative expenses	0	0	0	0
Income from operations	0	0	0	0
Interest expense, net	0	0	0	0
Foreign currency loss	0	0	0	0
Income (loss) before income taxes	0	0	0	0
Income tax expense (benefit)	0	0	0	0
(Loss) income before equity income (loss) from subsidiaries	0	0	0	0
Equity income (loss) from subsidiaries	(8,460)	(12,307)	(5,989)	(12,381)
Net income (loss)	(8,460)	(12,307)	(5,989)	(12,381)
Other comprehensive income (loss):
Pension and other postretirement benefit adjustments, net of tax	110	(27)	(216)	(53)
Foreign currency translation adjustments, net of tax	2,758	(20,422)	25,930	(2,314)
Total comprehensive (loss) income	$ (5,812)	$ (32,756)	$ 19,725	$ (14,748)