Subsidiary Guarantors - Condensed Consolidating Statement of Comprehensive Loss (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012
Condensed Financial Statements, Captions [Line Items]
Net sales	$ 339,905	$ 325,034	$ 873,464	$ 852,379
Cost of sales	257,959	243,430	664,569	648,975
Gross profit	81,946	81,604	208,895	203,404
Selling, general and administrative expenses	57,115	59,451	176,753	178,463
Income from operations	24,831	22,153	32,142	24,941
Interest expense, net	20,328	19,085	59,560	56,697
Foreign currency loss	124	(17)	555	220
Income (loss) before income taxes	4,379	3,085	(27,973)	(31,976)
Income tax expense (benefit)	1,884	2,555	4,015	4,991
(Loss) income before equity income (loss) from subsidiaries	2,495	530	(31,988)	(36,967)
Equity income (loss) from subsidiaries	0	0	0	0
Net income (loss)	2,495	530	(31,988)	(36,967)
Other comprehensive income (loss):
Pension and other postretirement benefit adjustments, net of tax	173	16	478	40
Foreign currency translation adjustments, net of tax	5,828	11,662	(9,444)	13,103
Total comprehensive (loss) income	8,496	12,208	(40,954)	(23,824)
Company
Condensed Financial Statements, Captions [Line Items]
Net sales	256,304	241,436	667,048	636,915
Cost of sales	197,199	181,626	513,518	485,784
Gross profit	59,105	59,810	153,530	151,131
Selling, general and administrative expenses	44,922	46,961	139,194	141,729
Income from operations	14,183	12,849	14,336	9,402
Interest expense, net	19,711	18,538	57,905	55,315
Foreign currency loss	0	0	0	0
Income (loss) before income taxes	(5,528)	(5,689)	(43,569)	(45,913)
Income tax expense (benefit)	(238)	462	1,177	1,868
(Loss) income before equity income (loss) from subsidiaries	(5,290)	(6,151)	(44,746)	(47,781)
Equity income (loss) from subsidiaries	7,785	6,681	12,758	10,814
Net income (loss)	2,495	530	(31,988)	(36,967)
Other comprehensive income (loss):
Pension and other postretirement benefit adjustments, net of tax	173	16	478	40
Foreign currency translation adjustments, net of tax	5,828	11,662	(9,444)	13,103
Total comprehensive (loss) income	8,496	12,208	(40,954)	(23,824)
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	46,845	47,830	131,740	133,563
Cost of sales	43,411	44,944	122,695	126,420
Gross profit	3,434	2,886	9,045	7,143
Selling, general and administrative expenses	978	1,603	3,782	4,782
Income from operations	2,456	1,283	5,263	2,361
Interest expense, net	0	0	0	0
Foreign currency loss	0	0	0	0
Income (loss) before income taxes	2,456	1,283	5,263	2,361
Income tax expense (benefit)	(43)	(23)	(119)	(59)
(Loss) income before equity income (loss) from subsidiaries	2,499	1,306	5,382	2,420
Equity income (loss) from subsidiaries	5,286	5,375	7,376	8,394
Net income (loss)	7,785	6,681	12,758	10,814
Other comprehensive income (loss):
Pension and other postretirement benefit adjustments, net of tax	113	11	331	35
Foreign currency translation adjustments, net of tax	5,828	11,662	(9,444)	13,103
Total comprehensive (loss) income	13,726	18,354	3,645	23,952
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net sales	81,750	84,424	206,355	218,919
Cost of sales	62,343	65,516	160,035	173,789
Gross profit	19,407	18,908	46,320	45,130
Selling, general and administrative expenses	11,215	10,887	33,777	31,952
Income from operations	8,192	8,021	12,543	13,178
Interest expense, net	617	547	1,655	1,382
Foreign currency loss	124	(17)	555	220
Income (loss) before income taxes	7,451	7,491	10,333	11,576
Income tax expense (benefit)	2,165	2,116	2,957	3,182
(Loss) income before equity income (loss) from subsidiaries	5,286	5,375	7,376	8,394
Equity income (loss) from subsidiaries	0	0	0	0
Net income (loss)	5,286	5,375	7,376	8,394
Other comprehensive income (loss):
Pension and other postretirement benefit adjustments, net of tax	101	12	303	36
Foreign currency translation adjustments, net of tax	5,828	11,662	(9,444)	13,103
Total comprehensive (loss) income	11,215	17,049	(1,765)	21,533
Reclassification/Eliminations
Condensed Financial Statements, Captions [Line Items]
Net sales	(44,994)	(48,656)	(131,679)	(137,018)
Cost of sales	(44,994)	(48,656)	(131,679)	(137,018)
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	(13,071)	(12,056)	(20,134)	(19,208)
Net income (loss)	(13,071)	(12,056)	(20,134)	(19,208)
Other comprehensive income (loss):
Pension and other postretirement benefit adjustments, net of tax	(214)	(23)	(634)	(71)
Foreign currency translation adjustments, net of tax	(11,656)	(23,324)	18,888	(26,206)
Total comprehensive (loss) income	$ (24,941)	$ (35,403)	$ (1,880)	$ (45,485)