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Restaurant Acquisition (Details) $ in Thousands |  |  |  | 6 Months Ended |
--- | --- | --- | --- | --- | ---
May 01, 2018 USD ($) restaurant | Apr. 16, 2018 USD ($) restaurant | Feb. 19, 2018 USD ($) restaurant | Jun. 30, 2018 USD ($) | Jul. 01, 2017 USD ($) | Dec. 30, 2017 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |
Number of Restaurants Acquired from a Franchisee | restaurant | 1 | 1 | 1 |  |  |
Acquisition of restaurant from franchisee | $ 2,200 | $ 1,900 | $ 1,900 | $ 5,996 | $ 0 |
Business Acquisition, Goodwill, Expected Tax Deductible Amount |  |  |  | 3,100 |  |
Working capital | 7 | 20 | 4 |  |  |
Property and equipment | 28 | 160 | 26 |  |  |
Reacquired franchise rights | 887 | 1,277 | 541 |  |  |
Goodwill | 1,309 | 458 | 1,331 | $ 49,655 |  | $ 46,557
Gift card liability | 0 | 0 | (2) |  |  |
Total purchase price | $ 2,231 | $ 1,915 | $ 1,900 |  |  |

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