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EARNINGS PER SHARE | 9 Months Ended
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Sep. 30, 2021
Earnings Per Share [Abstract] |
EARNINGS PER SHARE | Basic earnings per share is computed by dividing net income attributable to common stockholders by the weighted-average number of common shares outstanding during the periods. Diluted earnings per share is computed by dividing net income attributable to common stockholders by the weighted-average common shares and common share equivalents outstanding during the periods. The dilutive effect of common share equivalents is considered in the diluted earnings per share computation using the treasury stock method, which includes consideration of equity awards. The following table sets forth the details of basic and diluted earnings per share:
| Three Months Ended |  | Nine Months Ended
| September 30 |  | September 30
(In thousands, except per share data) | 2021 |  | 2020 |  | 2021 |  | 2020
Net income attributable to WESCO International, Inc. | $ | 119,596 |  |  | $ | 80,678 |  |  | $ | 297,969 |  |  | $ | 80,578 |
Less: Preferred stock dividends | 14,352 |  |  | 14,511 |  |  | 43,056 |  |  | 15,787 |
Net income attributable to common stockholders | $ | 105,244 |  |  | $ | 66,167 |  |  | $ | 254,913 |  |  | $ | 64,791 |
Weighted-average common shares outstanding used in computing basic earnings per share | 50,386 |  |  | 50,043 |  |  | 50,252 |  |  | 44,873 |
Common shares issuable upon exercise of dilutive equity awards | 1,677 |  |  | 444 |  |  | 1,644 |  |  | 231 |
Weighted-average common shares outstanding and common share equivalents used in computing diluted earnings per share | 52,063 |  |  | 50,487 |  |  | 51,896 |  |  | 45,104 |
Earnings per share attributable to common stockholders |  |  |  |  |  |  |
Basic | $ | 2.09 |  |  | $ | 1.32 |  |  | $ | 5.07 |  |  | $ | 1.44 |
Diluted | $ | 2.02 |  |  | $ | 1.31 |  |  | $ | 4.91 |  |  | $ | 1.44 |
The computation of diluted earnings per share attributable to common stockholders excludes stock-based awards that would have an antidilutive effect on earnings per share. For the three months ended September 30, 2021, there were no antidilutive stock-based awards, and for the nine months then ended, there were approximately 0.1 million antidilutive awards. For the three and nine months ended September 30, 2020, the computation of diluted earnings per share attributable to common stockholders excluded stock-based awards of approximately 2.0 million and 3.0 million, respectively.

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