Supplemental Guarantor Condensed Financial Information - Consolidated Statements of Comprehensive (Loss) Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 28, 2014	Mar. 29, 2013
Condensed Financial Statements, Captions [Line Items]
Net loss	$ (19,272)	$ (28,116)
Other comprehensive income (loss):
Foreign currency translation adjustment	(389)	(185)
Defined benefit pension plan adjustments	20	84
Total comprehensive income (loss)	(19,641)	(28,217)
Parent
Condensed Financial Statements, Captions [Line Items]
Net loss	(19,272)	(28,116)
Other comprehensive income (loss):
Foreign currency translation adjustment	(389)	(185)
Defined benefit pension plan adjustments	20	84
Total comprehensive income (loss)	(19,641)	(28,217)
Subsidiary Issuer
Condensed Financial Statements, Captions [Line Items]
Net loss	(19,154)	(28,023)
Other comprehensive income (loss):
Foreign currency translation adjustment	(389)	(185)
Defined benefit pension plan adjustments	20	84
Total comprehensive income (loss)	(19,523)	(28,124)
Non-Guarantor
Condensed Financial Statements, Captions [Line Items]
Net loss	(1,692)	(4,891)
Other comprehensive income (loss):
Foreign currency translation adjustment	(389)	(185)
Defined benefit pension plan adjustments	18	11
Total comprehensive income (loss)	(2,063)	(5,065)
Eliminations
Condensed Financial Statements, Captions [Line Items]
Net loss	20,846	32,914
Other comprehensive income (loss):
Foreign currency translation adjustment	778	370
Defined benefit pension plan adjustments	(38)	(95)
Total comprehensive income (loss)	$ 21,586	$ 33,189