Supplemental Guarantor Condensed Financial Information - Consolidated Statements of Comprehensive (Loss) Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 27, 2013	Sep. 28, 2012	Sep. 27, 2013	Sep. 28, 2012
Condensed Financial Statements, Captions [Line Items]
Net loss	$ 16,259	$ (1,175)	$ (13,413)	$ (24,887)
Other comprehensive income (loss):
Foreign currency translation adjustment	(89)	26	(431)	(176)
Defined benefit pension plan adjustments, net of tax	81	86	246	256
Total comprehensive income (loss)	16,251	(1,063)	(13,598)	(24,807)
Parent
Condensed Financial Statements, Captions [Line Items]
Net loss	16,259	(1,175)	(13,413)	(24,887)
Other comprehensive income (loss):
Foreign currency translation adjustment	(89)	26	(431)	(176)
Defined benefit pension plan adjustments, net of tax	81	86	246	256
Total comprehensive income (loss)	16,251	(1,063)	(13,598)	(24,807)
Subsidiary Issuer
Condensed Financial Statements, Captions [Line Items]
Net loss	16,584	(1,025)	(12,900)	(24,440)
Other comprehensive income (loss):
Foreign currency translation adjustment	(89)	26	(431)	(176)
Defined benefit pension plan adjustments, net of tax	81	86	246	256
Total comprehensive income (loss)	16,576	(913)	(13,085)	(24,360)
Non-Guarantor
Condensed Financial Statements, Captions [Line Items]
Net loss	(4,171)	(2,055)	(11,619)	(6,145)
Other comprehensive income (loss):
Foreign currency translation adjustment	(89)	26	(431)	112
Defined benefit pension plan adjustments, net of tax	8	24	29	70
Total comprehensive income (loss)	(4,252)	(2,005)	(12,021)	(5,963)
Eliminations
Condensed Financial Statements, Captions [Line Items]
Net loss	(12,413)	3,080	24,519	30,585
Other comprehensive income (loss):
Foreign currency translation adjustment	178	(52)	862	64
Defined benefit pension plan adjustments, net of tax	(89)	(110)	(275)	(326)
Total comprehensive income (loss)	$ (12,324)	$ 2,918	$ 25,106	$ 30,323