EARNINGS (LOSS) PER SHARE - Schedule of Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 28, 2022	Dec. 29, 2021	Dec. 30, 2020
Numerator:
Net loss attributable to Shake Shack Inc.—basic	$ (24,091)	$ (8,655)	$ (42,158)
Net loss attributable to Shake Shack Inc.—diluted	$ (24,091)	$ (8,655)	$ (42,158)
Denominator:
Weighted-average shares of Class A common stock outstanding—basic (shares)	39,237	39,085	37,129
Weighted-average shares of Class A common stock outstanding—diluted (shares)	39,237	39,085	37,129
Earnings per share of Class A common stock—basic (in dollars per share)	$ (0.61)	$ (0.22)	$ (1.14)
Earnings per share of Class A common stock—diluted (in dollars per share)	$ (0.61)	$ (0.22)	$ (1.14)