Supplemental Guarantor Condensed Financial Information - Consolidated Statements of Comprehensive (Loss) Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 28, 2013	Jun. 29, 2012	Jun. 28, 2013	Jun. 29, 2012
Condensed Financial Statements, Captions [Line Items]
Net loss	$ (1,556)	$ (15,592)	$ (29,672)	$ (23,712)
Other comprehensive income:
Foreign currency translation adjustment	(157)	(1,165)	(342)	(202)
Defined benefit pension plan adjustments, net of tax	81	85	165	170
Total comprehensive loss	(1,632)	(16,672)	(29,849)	(23,744)
Parent
Condensed Financial Statements, Captions [Line Items]
Net loss	(1,556)	(15,592)	(29,672)	(23,712)
Other comprehensive income:
Foreign currency translation adjustment	(157)	(1,165)	(342)	(202)
Defined benefit pension plan adjustments, net of tax	81	85	165	170
Total comprehensive loss	(1,632)	(16,672)	(29,849)	(23,744)
Subsidiary Issuer
Condensed Financial Statements, Captions [Line Items]
Net loss	(1,461)	(15,444)	(29,484)	(23,415)
Other comprehensive income:
Foreign currency translation adjustment	(157)	(1,165)	(342)	(202)
Defined benefit pension plan adjustments, net of tax	81	85	165	170
Total comprehensive loss	(1,537)	(16,524)	(29,661)	(23,447)
Non-Guarantor
Condensed Financial Statements, Captions [Line Items]
Net loss	(2,557)	(1,101)	(7,448)	(4,090)
Other comprehensive income:
Foreign currency translation adjustment	(157)	(699)	(342)	86
Defined benefit pension plan adjustments, net of tax	10	23	21	46
Total comprehensive loss	(2,704)	(1,777)	(7,769)	(3,958)
Eliminations
Condensed Financial Statements, Captions [Line Items]
Net loss	4,018	16,545	36,932	27,505
Other comprehensive income:
Foreign currency translation adjustment	314	1,864	684	116
Defined benefit pension plan adjustments, net of tax	(91)	(108)	(186)	(216)
Total comprehensive loss	$ 4,241	$ 18,301	$ 37,430	$ 27,405