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EARNINGS PER SHARE | 12 Months Ended
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Dec. 31, 2020
EARNINGS PER SHARE |
EARNINGS PER SHARE | NOTE 6. EARNINGS PER SHARE Basic earnings per share ("EPS") is computed by dividing income available to common stockholders by the weighted-average number of common shares outstanding during the period. The computation of our diluted EPS is similar to the computation of our basic EPS except that the denominator is increased to include the number of additional common shares that would have been outstanding (using the if-converted and treasury stock methods), if our outstanding stock options and restricted stock units had been converted to common shares, and if such assumed conversion is dilutive. The following is a reconciliation of the weighted-average shares outstanding used in the calculation of basic and diluted earnings per share: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Years Ended December 31,
​ |  | 2020 |  | 2019 |  | 2018
Income from continuing operations | ​ | $ | 135,151 | ​ | $ | 56,495 | ​ | $ | 147,149
Income from continuing operations attributable to noncontrolling interest | ​ |  | 55 | ​ |  | 34 | ​ |  | 86
Income from continuing operations attributable to Advanced Energy Industries, Inc. | ​ | $ | 135,096 | ​ | $ | 56,461 | ​ | $ | 147,063
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Basic weighted-average common shares outstanding | ​ |  | 38,314 | ​ |  | 38,281 | ​ |  | 39,081
Assumed exercise of dilutive stock options and restricted stock units | ​ |  | 228 | ​ |  | 214 | ​ |  | 271
Diluted weighted-average common shares outstanding | ​ |  | 38,542 | ​ |  | 38,495 | ​ |  | 39,352
Continuing operations: | ​ |  |  | ​ |  |  | ​ |  |
Basic earnings per share | ​ | $ | 3.53 | ​ | $ | 1.47 | ​ | $ | 3.76
Diluted earnings per share | ​ | $ | 3.51 | ​ | $ | 1.47 | ​ | $ | 3.74
​ The following stock options and restricted units were excluded in the computation of diluted earnings per share because they were anti-dilutive: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Years Ended December 31,
​ |  | 2020 |  | 2019 |  | 2018
Restricted stock units |  | — |  | — |  | 2
​ Share Repurchase In September 2015, our Board of Directors authorized a program to repurchase up to $150.0 million of our common stock over a thirty-month period. In November 2017, our Board of Directors approved an extension of the share repurchase program to December 2019 from its original maturity of March 2018. In May 2018, our Board of Directors approved a $50 million increase in its authorization to repurchase shares of our common stock under this same program. On December 18, 2019, our Board of Directors authorized the removal of the expiration date to the Company’s share repurchase program and increased the authorized amount by $25.1 million. As of December 31, 2020, the Company is authorized for the future repurchase of shares of our common stock of up to a total of $38.4 million. In order to execute the repurchase of shares of our common stock, the Company periodically enters into stock repurchase agreements. The Company has repurchased the following shares of common stock: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Years Ended December 31,
(in thousands, except per share amounts) |  | 2020 |  | 2019 |  | 2018
Amount paid to repurchase shares | ​ | $ | 11,630 | ​ | $ | — | ​ | $ | 95,125
Number of shares repurchased | ​ |  | 244 | ​ |  | — | ​ |  | 1,696
Average repurchase price per share | ​ | $ | 47.75 | ​ | $ | — | ​ | $ | 56.07
​ ​ ​ ​ ​ There were no shares repurchased from related parties. All shares repurchased were recognized as a reduction to Additional paid-in capital. Repurchased shares were retired and assumed the status of authorized and unissued shares.

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