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LEASES - Narrative (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Apr. 01, 2015 | Dec. 28, 2016 USD ($) | Dec. 30, 2015 USD ($) | Dec. 31, 2014 USD ($)
Leases [Abstract] |  |  |  |
Number of sale leaseback transactions | 0 | 8 |  |
Common area maintenance costs, real estate taxes, and other occocupancy costs not included in rent expense |  | $ 3,229 | $ 2,119 | $ 1,111
Deemed Landlord Financing Liability |  | $ 2,007 | $ 0 |

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- Definition Landlord contributions toward structural tenant improvements for those leases in which the Company is deemed for accounting purposes to be the owner of the asset. + References No definition available. + Details
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Balance Type: | credit
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- Definition Number of sale leaseback transactions + References No definition available. + Details
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Namespace Prefix: | shak_
Data Type: | xbrli:integerItemType
Balance Type: | na
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- Definition Operating Leases, Maintenance Costs, Real Estate Taxes, and Other Occupancy Costs + References No definition available. + Details
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Namespace Prefix: | shak_
Data Type: | xbrli:monetaryItemType
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Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
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