Supplemental Guarantor Condensed Financial Information - Consolidated Statements of Comprehensive (Loss) Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Apr. 03, 2015	Mar. 28, 2014
Condensed Financial Statements, Captions [Line Items]
Net loss	$ (31,411)us-gaap_NetIncomeLoss	$ (19,272)us-gaap_NetIncomeLoss
Other comprehensive (loss) income:
Foreign currency translation adjustment	221	(389)
Defined benefit pension plan adjustments, net of tax	(122)	(20)
Total comprehensive loss	(31,068)us-gaap_ComprehensiveIncomeNetOfTax	(19,641)us-gaap_ComprehensiveIncomeNetOfTax
Parent
Condensed Financial Statements, Captions [Line Items]
Net loss	(31,411)	(19,272)
Other comprehensive (loss) income:
Foreign currency translation adjustment	221	(389)
Defined benefit pension plan adjustments, net of tax	(122)	(20)
Total comprehensive loss	(31,068)	(19,641)
Subsidiary Issuer
Condensed Financial Statements, Captions [Line Items]
Net loss	(31,182)	(19,154)
Other comprehensive (loss) income:
Foreign currency translation adjustment	221	(389)
Defined benefit pension plan adjustments, net of tax	(122)	(20)
Total comprehensive loss	(30,839)	(19,523)
Non-Guarantor
Condensed Financial Statements, Captions [Line Items]
Net loss	1,099	(1,692)
Other comprehensive (loss) income:
Foreign currency translation adjustment	221	(389)
Defined benefit pension plan adjustments, net of tax	(44)	(18)
Total comprehensive loss	1,364	(2,063)
Eliminations
Condensed Financial Statements, Captions [Line Items]
Net loss	30,083	20,846
Other comprehensive (loss) income:
Foreign currency translation adjustment	(442)	778
Defined benefit pension plan adjustments, net of tax	166	38
Total comprehensive loss	$ 29,475	$ 21,586

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Other Comprehensive Income

-URI http://asc.fasb.org/extlink&oid=51831270

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Comprehensive Income

-URI http://asc.fasb.org/extlink&oid=51831223

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 220

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Reference 5: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

-Topic 944

-SubTopic 225

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-04.19)

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 19

-Article 5

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Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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-Topic 220

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-Section 45

-Paragraph 10A

-Subparagraph (a)

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Amount after tax and reclassification adjustments, of (increase) decrease in accumulated other comprehensive (income) loss related to pension and other postretirement defined benefit plans.

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