Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2016	Oct. 03, 2015	Oct. 01, 2016	Oct. 03, 2015
Statement of Comprehensive Income [Abstract]
Net sales	$ 332,482	$ 339,787	$ 892,552	$ 891,402
Cost of sales	244,743	258,083	665,755	686,780
Gross profit	87,739	81,704	226,797	204,622
Selling, general and administrative expenses	63,392	61,391	183,987	182,027
Restructuring costs	0	1,787	74	1,787
Other operating income	(158)	0	(890)	0
Income from operations	24,505	18,526	43,626	20,808
Interest expense	21,386	20,808	63,887	62,670
Foreign currency loss	305	806	470	1,923
Income (loss) before income taxes	2,814	(3,088)	(20,731)	(43,785)
Income tax expense	2,996	2,116	5,777	4,879
Net (loss) income	(182)	(5,204)	(26,508)	(48,664)
Other comprehensive income (loss); net of tax
Pension and other postretirement benefit adjustments	17	145	51	444
Foreign currency translation adjustments	(3,193)	(8,659)	9,254	(21,624)
Total comprehensive (loss) income	$ (3,358)	$ (13,718)	$ (17,203)	$ (69,844)