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EARNINGS PER SHARE - Schedule of Antidilutive Securities(Tables)
 6 Months Ended
Jun. 28, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]  
Schedule of earnings per share
The following table sets forth reconciliations of the numerators and denominators used to compute basic and diluted earnings per share of Class A common stock for the thirteen and twenty-six weeks ended June 28, 2017 and June 29, 2016.
 
 
 
Thirteen Weeks Ended
 
 
Twenty-Six Weeks Ended
 
 
 
 
June 28
2017

 
June 29
2016

 
June 28
2017

 
June 29
2016

Numerator:
 
 
 
 
 
 
 
 
Net income
$
8,184

 
$
6,549

 
$
12,046

 
$
9,900

 
Less: net income attributable to non-controlling interests
3,305

 
3,251

 
4,900

 
5,140

 
Net income attributable to Shake Shack Inc.
$
4,879

 
$
3,298

 
$
7,146

 
$
4,760

Denominator:
 
 
 
 
 
 
 
 
Weighted-average shares of Class A common stock outstanding—basic
25,798

 
22,553

 
25,587

 
21,453

 
Effect of dilutive securities:
 
 
 
 
 
 
 
 
 
Stock options
494

 
497

 
523

 
478

 
 
Performance stock units
20

 
—

 
23

 
—

 
Weighted-average shares of Class A common stock outstanding—diluted
26,312

 
23,050

 
26,133

 
21,931

 
 
 
 
 
 
 
 
 
 
Earnings per share of Class A common stock—basic
$
0.19

 
$
0.15

 
$
0.28

 
$
0.22

Earnings per share of Class A common stock—diluted
$
0.19

 
$
0.14

 
$
0.27

 
$
0.22