Fair Value Measurements (Narrative) (Details) (USD $)	12 Months Ended
Dec. 27, 2014	Dec. 28, 2013	Dec. 29, 2012
Fair Value Measurements [Abstract]
Reclassification from Level 1 to Level 2	$ 7,300,000
Reclassifications from Level 2 to Level 1	2,100,000
Carrying value of line of credit outstanding		30,000,000us-gaap_ShortTermBorrowings
Asset impairment	$ 770,000us-gaap_AssetImpairmentCharges	$ 2,966,000us-gaap_AssetImpairmentCharges	$ 1,759,000us-gaap_AssetImpairmentCharges

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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Amount of transfers of assets measured on a recurring basis out of Level 1 of the fair value hierarchy into Level 2.

+ References

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-Name Accounting Standards Codification

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Amount of transfers of assets measured on a recurring basis out of Level 2 of the fair value hierarchy into Level 1.

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Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

+ References

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