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REVENUE Schedule of Revenue Recognized (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 26, 2018 | Sep. 26, 2018 | Jun. 27, 2018 | Mar. 28, 2018 | Dec. 27, 2017 | Sep. 27, 2017 | Jun. 28, 2017 | Mar. 29, 2017 | Dec. 26, 2018 | Dec. 27, 2017 | Dec. 28, 2016
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
TOTAL REVENUE | $ 124,265 | $ 119,647 | $ 116,282 | $ 99,116 | $ 96,136 | $ 94,609 | $ 91,316 | $ 76,749 | $ 459,310 | $ 358,810 | $ 268,475
Shack sales |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
TOTAL REVENUE |  |  |  |  |  |  |  |  | 445,589 | 346,388 | 259,350
Licensing revenue |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
TOTAL REVENUE |  |  |  |  |  |  |  |  | 13,721 | $ 12,422 | $ 9,125
If reported under ASC 605 |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
TOTAL REVENUE |  |  |  |  |  |  |  |  | 459,978 |  |
If reported under ASC 605 | Shack sales |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
TOTAL REVENUE |  |  |  |  |  |  |  |  | 445,589 |  |
If reported under ASC 605 | Licensing revenue |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
TOTAL REVENUE |  |  |  |  |  |  |  |  | 14,389 |  |
ASC 2014-09 | Increase (decrease) |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
TOTAL REVENUE |  |  |  |  |  |  |  |  | (668) |  |
ASC 2014-09 | Increase (decrease) | Shack sales |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
TOTAL REVENUE |  |  |  |  |  |  |  |  | 0 |  |
ASC 2014-09 | Increase (decrease) | Licensing revenue |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
TOTAL REVENUE |  |  |  |  |  |  |  |  | $ (668) |  |

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