Acquisitions of Restaurants (Details) $ in Thousands	3 Months Ended
Mar. 27, 2016 USD ($) item restaurant	Dec. 27, 2015 USD ($)
Acquisition disclosures
Number of transactions in which acquisition completed \| item	2
Purchase price allocation
Goodwill	$ 87,740	$ 79,657
Multiple restaurants acquired, 2016
Acquisition disclosures
Number of restaurants acquired \| restaurant	20
Purchase price allocation
Property and equipment	$ 1,028
Franchise rights	1,230
Goodwill	8,837
Other	107
Total purchase price	$ 11,202

Number of restaurants acquired.

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The amount of identifiable intangible assets recognized as of the acquisition date.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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