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Summary of Significant Accounting Policies (Advertising Costs) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
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Dec. 25, 2019 | Sep. 25, 2019 | Jun. 26, 2019 | Mar. 27, 2019 | Dec. 26, 2018 | Sep. 26, 2018 | Jun. 27, 2018 | Mar. 28, 2018 | Dec. 25, 2019 | Dec. 26, 2018 | Dec. 27, 2017
Franchisor Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |
Advertising expense |  |  |  |  |  |  |  |  | $ 11,200 | $ 15,000 | $ 14,300
Revenue | $ 113,836 | $ 124,258 | $ 151,884 | $ 151,411 | $ 159,549 | $ 158,023 | $ 157,334 | $ 155,273 | 541,389 | 630,179 | 529,169
Advertising contributions from franchisees |  |  |  |  |  |  |  |  |  |  | 79,700
Advertising revenue |  |  |  |  |  |  |  |  |  |  |
Franchisor Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | $ 81,144 | $ 78,308 | $ 0

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- Definition Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 720 -SubTopic 35 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6420018&loc=d3e36677-107848 + Details
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