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Revenue from Contracts with Customers (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2018 | Jul. 01, 2017 | Jun. 30, 2018 | Jul. 01, 2017 | Dec. 30, 2017
Disaggregation of Revenue [Line Items] |  |  |  |  |
Advertising fees and related income | $ 8,355 | $ 7,466 | $ 16,960 | $ 14,734 |
Contract with Customer, Portion of Liability not yet being Amortized | 9,300 |  | $ 9,300 |  | $ 10,100
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period |  |  | 7 years 8 months 12 days |  |
Franchise Segment [Member] | Transferred over Time [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Initial Franchise Fees | 618 | 527 | $ 1,304 | 1,268 |
Franchise Segment [Member] | Transferred at Point in Time [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Royalty Revenue | 14,950 | 13,133 | 30,336 | 25,824 |
Advertising fees and related income | $ 8,355 | $ 7,466 | $ 16,960 | $ 14,734 |

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- Definition The amount of initial franchise fees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 952 -SubTopic 605 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=68064525&loc=d3e68606-108044 + Details
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- Definition Revenue earned during the period from the leasing or otherwise lending to a third party the entity's rights or title to certain property. Royalty revenue is derived from a percentage or stated amount of sales proceeds or revenue generated by the third party using the entity's property. Examples of property from which royalties may be derived include patents and oil and mineral rights. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(e)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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