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NON-CONTROLLING INTERESTS - Changes in Ownership Interests in SSE Holdings (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 30, 2022
Mar. 31, 2021
Noncontrolling Interest [Line Items]    
Net income (loss) attributable to Shake Shack Inc. $ (10,162) $ 1,309
Change in foreign currency translation adjustment (1) (1)
Other comprehensive income (loss):    
Unrealized holding gains on equity securities (1) (1)
Transfers (to) from non-controlling interests:    
Total effect of changes in ownership interest on equity (loss) attributable to Shake Shack Inc. (12,390) 4,703
Redemption or Exchange of Units    
Transfers (to) from non-controlling interests:    
Increase (decrease) in additional paid-in capital 49 36
Employee Stock Option    
Transfers (to) from non-controlling interests:    
Increase (decrease) in additional paid-in capital (2,276) 3,359
Unrealized holding gains on equity securities    
Noncontrolling Interest [Line Items]    
Change in foreign currency translation adjustment $ (1) $ (1)