Acquisition Purchase Price Allocation, 2015 Acquisitions (Details) $ in Thousands	12 Months Ended
Jan. 03, 2016 USD ($)	Dec. 28, 2014 USD ($)	Dec. 29, 2013 USD ($)
Business Acquisition [Line Items]
Number of acquisitions	8	5
Inventory	$ 544	$ 1,267
Land and building	22,614	15,955
Restaurant equipment	2,844	5,818
Restaurant equipment - subject to capital lease	443	1,381
Leasehold improvements	1,770	1,804
Franchise fees	1,000	3,064
Franchise rights	20,666	17,098
Favorable leases	1,475	2,096
Goodwill	20,438	17,793	$ 8,162
Capital lease obligation for restaurant equipment	(494)	(1,458)
Unfavorable leases	(324)	(5,912)
Other liabilities	(433)	(135)
Purchase price	52,750	$ 52,200
2015 Acquisitions [Member]
Business Acquisition [Line Items]
Goodwill	$ 2,645

Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Franchise Fees

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Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Franchise Rights

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Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Land and Building

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Number of separate acquisition transactions during the period

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Amount of facility held for productive use including, but not limited to, office, production, storage and distribution facilities, acquired at the acquisition date.

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Amount of capital lease obligation, assumed at the acquisition date.

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Amount of tangible personal property used to produce goods and services, including, but is not limited to, tools, dies and molds, computer and office equipment, acquired at the acquisition date.

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

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The amount of inventory recognized as of the acquisition date.

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Amount of other liabilities due after one year or the normal operating cycle, if longer, assumed at the acquisition date.

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The amount of property, plant, and equipment recognized as of the acquisition date.

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Amount recognized for assets, including goodwill, in excess of (less than) the aggregate liabilities assumed.

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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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