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Income per Share | 3 Months Ended
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Mar. 31, 2018
Earnings Per Share [Abstract] |
Income per Share | Income per Share The following is a summary of basic and diluted income per share (in thousands, except share and per share amounts):
| Three Months Ended March 31,
| 2018 |  | 2017
Net income available to common stockholders | $ | 86,298 |  |  | $ | 66,145 |
Weighted average shares outstanding—basic | 205,714,173 |  |  | 159,297,027 |
Potentially dilutive common shares: |  |  |
Stock options | — |  |  | 4 |
Unvested incentive units | 302,016 |  |  | 237,336 |
Forward equity offering | — |  |  | 283,388 |
Market performance-based awards | 491,287 |  |  | 603,900 |
Weighted average shares outstanding—diluted | 206,507,476 |  |  | 160,421,655 |
Income per share: |  |  |
Basic | $ | 0.42 |  |  | $ | 0.42 |
Diluted | $ | 0.42 |  |  | $ | 0.41 |
We have excluded the following potentially dilutive securities in the calculations above as they would be antidilutive or not dilutive:
| Three Months Ended March 31,
| 2018 |  | 2017
Weighted average of Operating Partnership common units not owned by Digital Realty Trust, Inc. | 8,295,287 |  |  | 2,177,874 |
Potentially dilutive Series C Cumulative Redeemable Perpetual Preferred Stock | 1,967,430 |  |  | — |
Potentially dilutive Series F Cumulative Redeemable Preferred Stock | — |  |  | 1,783,083 |
Potentially dilutive Series G Cumulative Redeemable Preferred Stock | 2,439,505 |  |  | 2,438,074 |
Potentially dilutive Series H Cumulative Redeemable Preferred Stock | 3,574,840 |  |  | 3,572,744 |
Potentially dilutive Series I Cumulative Redeemable Preferred Stock | 2,442,359 |  |  | 2,440,928 |
Potentially dilutive Series J Cumulative Redeemable Preferred Stock | 1,948,598 |  |  | — |
Total | 20,668,019 |  |  | 12,412,703 |

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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