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Earnings per Share and Unit | 12 Months Ended
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Dec. 31, 2021
Earnings Per Share And Unit [Abstract] |
Earnings per Share and Unit | 15. Earnings per Share and Unit Parent Company Earnings per Share The following summarizes the calculation of basic and diluted earnings per share:
|  | Year ended December 31, |
(in thousands, except per share data) |  | 2021 |  |  | 2020 |  |  | 2019 |
Numerator: |  |  |  |  |  |  |  |  |
Income attributable to common stockholders - basic |  | $ | 361,411 |  |  | $ | 44,889 |  |  |  | 239,430 |
Income attributable to common stockholders - diluted |  | $ | 361,411 |  |  | $ | 44,889 |  |  |  | 239,430 |
Denominator: |  |  |  |  |  |  |  |  |
Weighted average common shares outstanding for basic EPS |  |  | 170,236 |  |  |  | 169,231 |  |  |  | 167,526 |
Weighted average common shares outstanding for diluted EPS (1) (2) |  |  | 170,694 |  |  |  | 169,460 |  |  |  | 167,771 |
Income per common share – basic |  | $ | 2.12 |  |  | $ | 0.27 |  |  |  | 1.43 |
Income per common share – diluted |  | $ | 2.12 |  |  | $ | 0.26 |  |  |  | 1.43 |
(1) Includes the dilutive impact of unvested restricted stock. (2) Using the treasury stock method, weighted average common shares outstanding for basic and diluted earnings per share exclude 1.0 million and 1.9 million shares issuable under the forward ATM equity offering outstanding during 2021 and 2019, respectively, as they would be anti-dilutive. Income allocated to noncontrolling interests of the Operating Partnership has been excluded from the numerator and exchangeable Operating Partnership units have been omitted from the denominator for the purpose of computing diluted earnings per share since the effect of including these amounts in the numerator and denominator would be anti-dilutive. Weighted average exchangeable Operating Partnership units outstanding for the years ended December 31, 2021, 2020, and 2019, were 761,955, 765,046, and 464,286, respectively. Operating Partnership Earnings per Unit The following summarizes the calculation of basic and diluted earnings per unit:
|  | Year ended December 31, |
(in thousands, except per share data) |  | 2021 |  |  | 2020 |  |  | 2019 |
Numerator: |  |  |  |  |  |  |  |  |
Income attributable to common unit holders - basic |  | $ | 363,026 |  |  | $ | 45,092 |  |  |  | 240,064 |
Income attributable to common unit holders - diluted |  | $ | 363,026 |  |  | $ | 45,092 |  |  |  | 240,064 |
Denominator: |  |  |  |  |  |  |  |  |
Weighted average common units outstanding for basic EPU |  |  | 170,998 |  |  |  | 169,997 |  |  |  | 167,990 |
Weighted average common units outstanding for diluted EPU (1) (2) |  |  | 171,456 |  |  |  | 170,225 |  |  |  | 168,235 |
Income per common unit – basic |  | $ | 2.12 |  |  | $ | 0.27 |  |  |  | 1.43 |
Income per common unit – diluted |  | $ | 2.12 |  |  | $ | 0.26 |  |  |  | 1.43 |
(1) Includes the dilutive impact of unvested restricted stock. (2) Using the treasury stock method, weighted average common shares outstanding for basic and diluted earnings per share exclude 1.0 million and 1.9 million shares issuable under the forward ATM equity offering outstanding during 2021 and 2019, respectively, as they would be anti-dilutive.

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