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NON-CONTROLLING INTERESTS - Schedule of Non-Controlling Interest (Details) - USD ($) $ in Thousands	3 Months Ended								11 Months Ended	12 Months Ended
	Dec. 28, 2016	Sep. 28, 2016	Jun. 29, 2016	Mar. 30, 2016	Dec. 30, 2015	Sep. 30, 2015	Jul. 01, 2015	Apr. 01, 2015	Dec. 30, 2015	Dec. 28, 2016		Dec. 30, 2015		Dec. 31, 2014
Noncontrolling Interest [Line Items]
Net income (loss) attributable to Shake Shack Inc.	$ 3,920	$ 3,766	$ 3,298	$ 1,462	$ 1,246	$ 1,528	$ 1,118	$ (12,668)		$ 12,446		$ (8,776)		$ 2,118
Net income (loss) attributable to Shake Shack Inc.										12,436		(8,781)		2,118
Unrealized holding losses on available-for-sale securities									$ (11)	(16)	[1]	(11)	[1]	0	[1]
Total effect of changes in ownership interest on equity attributable to Shake Shack Inc.										30,247		(57,134)		2,118
Accumulated Other Comprehensive Loss
Noncontrolling Interest [Line Items]
Unrealized holding losses on available-for-sale securities									$ (5)	(10)		(5)		0
Unit appreciation rights
Noncontrolling Interest [Line Items]
Transfers (to) from non-controlling interests										0		987		0
Stock options
Noncontrolling Interest [Line Items]
Transfers (to) from non-controlling interests										825
IPO
Noncontrolling Interest [Line Items]
Transfers (to) from non-controlling interests										0		(75,182)		0
Redemption or Exchange of Units
Noncontrolling Interest [Line Items]
Transfers (to) from non-controlling interests										16,986		19,934		0
USC Merger
Noncontrolling Interest [Line Items]
Transfers (to) from non-controlling interests										$ 0		$ 5,908		$ 0
[1] Net of tax benefit of $0 for fiscal years ended December 28, 2016, December 30, 2015 and December 31, 2014.

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