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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 25, 2020
Statement of Comprehensive Income [Abstract]
Net income (loss) attributable to Shake Shack Inc.—basic	$ 575	$ (1,079)
Other comprehensive income (loss), net of tax(1):
Change in foreign currency translation adjustment	(1)	1
Net change	(1)	1
OTHER COMPREHENSIVE INCOME (LOSS)	(1)	1
COMPREHENSIVE INCOME (LOSS)	574	(1,078)
Less: comprehensive loss attributable to non-controlling interest	(734)	(119)
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO SHAKE SHACK INC.	$ 1,308	$ (959)

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