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EARNINGS (LOSS) PER SHARE | 12 Months Ended
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Dec. 27, 2023
Earnings Per Share [Abstract] |
EARNINGS (LOSS) PER SHARE | EARNINGS (LOSS) PER SHARE Basic earnings (loss) per share of Class A common stock is computed by dividing Net income (loss) attributable to Shake Shack Inc. by the weighted average number of shares of Class A common stock outstanding during the period. Diluted earnings (loss) per share of Class A common stock is computed by dividing Net income (loss) attributable to Shake Shack Inc. by the weighted average number of shares of Class A common stock outstanding adjusted to give effect to potentially dilutive securities. The following table sets forth reconciliations of the numerators and denominators used to compute basic and diluted earnings (loss) per share of Class A common stock (in thousands, except per share amounts):
|  |  |  |  | (As Restated) |  | (As Restated)
|  |  | 2023 |  | 2022 |  | 2021
Numerator: |  |  |  |  |
| Net income (loss) attributable to Shake Shack Inc.—basic | $ | 20,264 |  |  | $ | (21,229) |  |  | $ | (4,561) |
| Reallocation of net income attributable to non-controlling interests from the assumed conversion of Class B shares | 726 |  |  | — |  |  | — |
| Net income (loss) attributable to Shake Shack Inc.—diluted | $ | 20,990 |  |  | $ | (21,229) |  |  | $ | (4,561) |
Denominator: |  |  |  |  |
| Weighted average shares of Class A common stock outstanding—basic | 39,419 |  |  | 39,237 |  |  | 39,085 |
| Effect of dilutive securities: |  |  |  |  |
|  | Stock options | 75 |  |  | — |  |  | — |
|  | Performance stock units | 11 |  |  | — |  |  | — |
|  | Restricted stock units | 85 |  |  | — |  |  | — |
|  | Convertible Notes | 1,467 |  |  | — |  |  | — |
|  | Shares of Class B common stock | 2,842 |  |  | — |  |  | — |
| Weighted average shares of Class A common stock outstanding—diluted | 43,899 |  |  | 39,237 |  |  | 39,085 |
Earnings (loss) per share of Class A common stock—basic | $ | 0.51 |  |  | $ | (0.54) |  |  | $ | (0.12) |
Earnings (loss) per share of Class A common stock—diluted | $ | 0.48 |  |  | $ | (0.54) |  |  | $ | (0.12) |
The effect of potential share settlement of the Convertible Notes outstanding for the period is included as potentially dilutive shares of Class A common stock under application of the if-converted method in the computation of diluted earnings (loss) per share, except when the effect would be anti-dilutive. Refer to Note 9, Debt, for additional information. Shares of Class B common stock do not share in the earnings or losses of Shake Shack and are therefore not participating securities. As such, separate presentation of basic and diluted earnings (loss) per share of Class B common stock under the two-class method has not been presented. However, shares of Class B common stock outstanding for the period are considered potentially dilutive shares of Class A common stock under application of the if-converted method and are included in the computation of diluted earnings (loss) per share, except when the effect would be anti-dilutive. The following table presents potentially dilutive securities excluded from the computations of diluted earnings (loss) per share of Class A common stock:
|  |  | 2023 |  | 2022 |  | 2021
Stock options | — |  |  |  | 134,031 |  | (2) |  | 154,231 |  | (2)
Performance stock units | 99,718 |  | (1) |  | 159,822 |  | (2) |  | 186,159 |  | (2)
Restricted stock units | — |  |  |  | 395,853 |  | (2) |  | 231,429 |  | (2)
Shares of Class B common stock | — |  |  |  | 2,869,513 |  | (2) |  | 2,921,587 |  | (2)
Convertible notes | — |  |  |  | 1,466,975 |  | (2) |  | 1,466,975 |  | (2)
(1)Number of securities outstanding at the end of the period that were excluded from the computation of diluted earnings (loss) per share of Class A common stock because the performance conditions associated with these awards were not met assuming the end of the reporting period was the end of the performance period. (2)Number of securities outstanding at the end of the period that were excluded from the computation of diluted earnings (loss) per share of Class A common stock because the effect would have been anti-dilutive.

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