Condensed Consolidated Statements of Comprehensive Loss (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012
Statement of Comprehensive Income [Abstract]
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 (gain)	124	(17)	555	220
Income (loss) before income taxes	4,379	3,085	(27,973)	(31,976)
Income tax expense	1,884	2,555	4,015	4,991
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 income (loss)	$ 8,496	$ 12,208	$ (40,954)	$ (23,824)