Supplemental Guarantor Condensed Financial Information - Consolidated Statements of Comprehensive (Loss) Income (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 28, 2012	Jun. 29, 2012	Mar. 30, 2012	Dec. 30, 2011	Sep. 30, 2011	Jul. 01, 2011	Apr. 01, 2011	Dec. 31, 2012	Dec. 30, 2011	Dec. 31, 2010
Condensed Financial Statements, Captions [Line Items]
Net loss	$ (11,881,000)	$ (1,175,000)	$ (15,592,000)	$ (8,120,000)	$ (25,215,000)	$ (27,045,000)	$ (2,126,000)	$ (8,331,000)	$ (36,768,000)	$ (62,717,000)	$ (38,540,000)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent									80,000	2,380,000	(7,256,000)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax									953,000	(5,837,000)	3,329,000
Other Comprehensive Income (Loss), Amortization of Losses on Derivative Instruments, Net of Tax									0	0	2,904,000
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent									1,033,000	(3,457,000)	(1,023,000)
Total comprehensive (loss) income									(35,735,000)	(66,174,000)	(39,563,000)
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent, Parenthetical Disclosures [Abstract]
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized (Gain) Loss Arising During Period, Tax									225,000	45,000	1,334,000
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax									0	0	1,383,000
Parent
Condensed Financial Statements, Captions [Line Items]
Net loss									(36,768,000)	(62,717,000)	(38,540,000)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent									80,000	2,380,000	(7,256,000)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax									953,000	(5,837,000)	3,329,000
Other Comprehensive Income (Loss), Amortization of Losses on Derivative Instruments, Net of Tax									0	0	2,904,000
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent									1,033,000	(3,457,000)	(1,023,000)
Total comprehensive (loss) income									(35,735,000)	(66,174,000)	(39,563,000)
Subsidiary Issuer
Condensed Financial Statements, Captions [Line Items]
Net loss									(36,450,000)	(62,123,000)	(38,030,000)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent									80,000	2,380,000	(7,256,000)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax									953,000	(5,837,000)	3,329,000
Other Comprehensive Income (Loss), Amortization of Losses on Derivative Instruments, Net of Tax											2,904,000
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent									1,033,000	(3,457,000)	(1,023,000)
Total comprehensive (loss) income									(35,417,000)	(65,580,000)	(39,053,000)
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent, Parenthetical Disclosures [Abstract]
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized (Gain) Loss Arising During Period, Tax									(200)	0	500
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax											1,400
Non-Guarantor
Condensed Financial Statements, Captions [Line Items]
Net loss									(13,618,000)	(4,514,000)	(1,874,000)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent									367,000	2,092,000	(7,256,000)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax									1,196,000	(3,351,000)	3,382,000
Other Comprehensive Income (Loss), Amortization of Losses on Derivative Instruments, Net of Tax											0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent									1,563,000	(1,259,000)	(3,874,000)
Total comprehensive (loss) income									(12,055,000)	(5,773,000)	(5,748,000)
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent, Parenthetical Disclosures [Abstract]
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized (Gain) Loss Arising During Period, Tax									400	100	1,300
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax											0
Eliminations
Condensed Financial Statements, Captions [Line Items]
Net loss									50,068,000	66,637,000	39,904,000
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent									(447,000)	(4,472,000)	14,512,000
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax									(2,149,000)	9,188,000	(6,711,000)
Other Comprehensive Income (Loss), Amortization of Losses on Derivative Instruments, Net of Tax											(2,904,000)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent									(2,596,000)	4,716,000	4,897,000
Total comprehensive (loss) income									47,472,000	71,353,000	44,801,000
Retained Earnings [Member]
Condensed Financial Statements, Captions [Line Items]
Net loss									$ (36,768,000)	$ (62,717,000)	$ (38,540,000)