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Impairment Of Long-Lived Assets And Other Lease Charges (Details) (USD $)	3 Months Ended		12 Months Ended
	Mar. 29, 2015	Mar. 30, 2014	Dec. 28, 2014
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment Charges	$ 500,000us-gaap_AssetImpairmentCharges	$ 200,000us-gaap_AssetImpairmentCharges
Previously Impaired [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment Charges	300,000
Provisions for closures [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Other lease charges	$ 1,170,000	$ 400,000	$ 724,000
Closed Restaurants [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Other Lease Charges, Number of Restaurants	8	1

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Includes, but is not limited to, one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and termination benefits associated with an ongoing benefit arrangement. Excludes expenses associated with special or contractual termination benefits, a discontinued operation or an asset retirement obligation.

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