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. 26, 2014	Sep. 27, 2013	Sep. 26, 2014	Sep. 27, 2013
Condensed Financial Statements, Captions [Line Items]
Net (loss) income	$ (16,406)	$ 16,259	$ (38,794)	$ (13,413)
Other comprehensive (loss) income:
Foreign currency translation adjustment	204	(89)	(250)	(431)
Defined benefit pension plan adjustments, net of tax	(21)	(81)	(62)	(246)
Total comprehensive loss	(16,181)	16,251	(38,982)	(13,598)
Parent
Condensed Financial Statements, Captions [Line Items]
Net (loss) income	(16,406)	16,259	(38,794)	(13,413)
Other comprehensive (loss) income:
Foreign currency translation adjustment	204	(89)	(250)	(431)
Defined benefit pension plan adjustments, net of tax	(21)	(81)	(62)	(246)
Total comprehensive loss	(16,181)	16,251	(38,982)	(13,598)
Subsidiary Issuer
Condensed Financial Statements, Captions [Line Items]
Net (loss) income	(16,304)	16,584	(38,472)	(12,900)
Other comprehensive (loss) income:
Foreign currency translation adjustment	204	(89)	(250)	(431)
Defined benefit pension plan adjustments, net of tax	(21)	(81)	(62)	(246)
Total comprehensive loss	(16,079)	16,576	(38,660)	(13,085)
Non-Guarantor
Condensed Financial Statements, Captions [Line Items]
Net (loss) income	(1,471)	(4,171)	(4,455)	(11,619)
Other comprehensive (loss) income:
Foreign currency translation adjustment	204	(89)	(250)	(431)
Defined benefit pension plan adjustments, net of tax	(18)	(8)	(55)	(29)
Total comprehensive loss	(1,249)	(4,252)	(4,650)	(12,021)
Eliminations
Condensed Financial Statements, Captions [Line Items]
Net (loss) income	17,775	(12,413)	42,927	24,519
Other comprehensive (loss) income:
Foreign currency translation adjustment	(408)	178	500	862
Defined benefit pension plan adjustments, net of tax	39	89	117	275
Total comprehensive loss	$ 17,328	$ (12,324)	$ 43,310	$ 25,106