v3.26.1
NON-CONTROLLING INTERESTS - Changes in Ownership Interests in SSE Holdings (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jul. 01, 2026
Jun. 25, 2025
Jul. 01, 2026
Jun. 25, 2025
Noncontrolling Interest [Line Items]        
Net income attributable to Shake Shack Inc. $ 15,680 $ 17,148 $ 15,390 $ 21,393
Other comprehensive loss:        
Foreign currency translation adjustment 0 [1] (2) [1] (5) (3)
Transfers (to) from non-controlling interests:        
Total effect of changes in ownership interest on equity attributable to Shake Shack Inc. 15,040 16,017 9,289 11,600
Unrealized holding gains on equity securities        
Other comprehensive loss:        
Foreign currency translation adjustment 0 (2) (5) (3)
Additional Paid-In Capital | Redemption or Exchange of Units        
Transfers (to) from non-controlling interests:        
Increase (decrease) in additional paid-in capital 54 20 70 (299)
Additional Paid-In Capital | Employee Stock Option        
Transfers (to) from non-controlling interests:        
Increase (decrease) in additional paid-in capital $ (694) $ (1,149) $ (6,166) $ (9,491)
[1] Net of tax expense of $0 for the thirteen and twenty-six weeks ended July 1, 2026 and June 25, 2025.