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Acquisition of Business (Summary of Fair Value of Assets Acquired and Liabilities Assumed - Mars Super Market Stores) (Details) - USD ($) $ in Thousands | Dec. 30, 2017 | Dec. 31, 2016 | Aug. 01, 2016
--- | --- | --- | ---
Business Acquisition [Line Items] |  |  |
Goodwill | $ 52,330 | $ 52,330 |
Mars Super Market [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Inventories |  |  | $ 1,267
Accounts receivable and prepaid expenses |  |  | 248
Property and equipment |  |  | 7,305
Goodwill |  |  | 13,255
Intangibles - favorable leasehold interest, net |  |  | 2,495
Total fair value of assets acquired |  |  | $ 24,570

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- Definition Amount due from customers or clients for goods or services, including trade receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date in addition to the amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer, acquired at the acquisition date. + References No definition available. + Details
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