Summary of Fair Value of Interest Rate Swaps (Details) (Interest Rate Swap [Member], Other Noncurrent Liabilities, USD $) In Thousands, unless otherwise specified	Sep. 27, 2014	Dec. 28, 2013
Interest Rate Swap [Member] \| Other Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Fair value	$ (578)	$ (1,471)

Fair value as of the balance sheet date of all interest rate derivative liabilities designated as cash flow hedging instruments.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4B

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624163-113959

Name:	us-gaap_InterestRateCashFlowHedgeLiabilityAtFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant