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COMMITMENTS AND CONTINGENCIES (Details) $ in Thousands |  | 1 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | --- | ---
May 01, 2017 USD ($) | Nov. 30, 2015 USD ($) manager | Sep. 27, 2017 USD ($) | Sep. 28, 2016 USD ($) | Dec. 28, 2016 USD ($) | Dec. 31, 2013 USD ($)
Loss Contingencies [Line Items] |  |  |  |  |  |
Document period end date |  |  | Sep. 27, 2017 |  |  |
Percentage of tax benefits due to equity owners |  |  | 85.00% |  |  |
Establishment of liabilities under tax receivable agreement |  |  | $ 12,918 | $ 90,776 |  |
Tax receivable agreement liability |  |  | $ 283,961 |  | $ 272,482 |
Exempt Classification Matter |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Number of former Shake Shack managers | manager |  | 2 |  |  |  |
Settlement amount |  | $ (750) |  |  |  |
Loss Contingency Accrual, Payments | $ 774 |  |  |  |  |
Letter of credit |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Renewal term |  |  | 1 year |  |  |
Retail site |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Letters of credit outstanding |  |  | $ 160 |  |  |
Office building |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Letters of credit outstanding |  |  | $ 603 |  |  | $ 80

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