Fair Value Measurement (Details 2) (USD $) In Thousands, unless otherwise specified	Sep. 25, 2012	Dec. 27, 2011
Carrying Amount \| Level 1
Carrying amount and Fair value of financial instruments
Revolver	$ 50,000	$ 60,000
Carrying Amount \| Level 2
Carrying amount and Fair value of financial instruments
Installment loans	1,527	1,679
Fair Value \| Level 1
Carrying amount and Fair value of financial instruments
Revolver	50,000	60,000
Fair Value \| Level 2
Carrying amount and Fair value of financial instruments
Installment loans	$ 1,826	$ 2,044

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. Fair value of lines of credit at the balance sheet date.

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Line-of-Credit Arrangement

-URI http://asc.fasb.org/extlink&oid=6517033

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