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Income per Unit | 9 Months Ended
--- | ---
Sep. 30, 2018
Digital Realty Trust, L.P. |
Class of Stock [Line Items] |
Income per Unit | Income per Unit The following is a summary of basic and diluted income per unit (in thousands, except unit and per unit amounts):
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2018 |  | 2017 |  | 2018 |  | 2017
Net income (loss) available to common unitholders | $ | 69,968 |  |  | $ | (4,219 | ) |  | $ | 227,580 |  |  | $ | 121,474 |
Weighted average units outstanding—basic | 214,289,384 |  |  | 173,460,704 |  |  | 214,199,414 |  |  | 166,048,072 |
Potentially dilutive common units: |  |  |  |  |  |  |
Unvested incentive units | 169,100 |  |  | — |  |  | 160,117 |  |  | 166,493 |
Forward equity offering | 37,884 |  |  | — |  |  | 1,847 |  |  | 150,369 |
Market performance-based awards | 440,800 |  |  | — |  |  | 462,632 |  |  | 572,928 |
Weighted average units outstanding—diluted | 214,937,168 |  |  | 173,460,704 |  |  | 214,824,010 |  |  | 166,937,862 |
Income (loss) per unit: |  |  |  |  |  |  |
Basic | $ | 0.33 |  |  | $ | (0.02 | ) |  | $ | 1.06 |  |  | $ | 0.73 |
Diluted | $ | 0.33 |  |  | $ | (0.02 | ) |  | $ | 1.06 |  |  | $ | 0.73 |
We have excluded the following potentially dilutive securities in the calculations above as they would be antidilutive or not dilutive:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2018 |  | 2017 |  | 2018 |  | 2017
Potentially dilutive Series C Cumulative Redeemable Perpetual Preferred Units | 1,727,724 |  |  | 329,709 |  |  | 1,864,489 |  |  | 109,903 |
Potentially dilutive Series F Cumulative Redeemable Preferred Units | — |  |  | — |  |  | — |  |  | 617,734 |
Potentially dilutive Series G Cumulative Redeemable Preferred Units | 2,142,282 |  |  | 2,193,331 |  |  | 2,311,864 |  |  | 2,262,875 |
Potentially dilutive Series H Cumulative Redeemable Preferred Units | 3,139,291 |  |  | 3,214,098 |  |  | 3,387,795 |  |  | 3,316,008 |
Potentially dilutive Series I Cumulative Redeemable Preferred Units | 2,144,789 |  |  | 2,195,898 |  |  | 2,314,569 |  |  | 2,265,524 |
Potentially dilutive Series J Cumulative Redeemable Preferred Units | 1,711,186 |  |  | 1,045,730 |  |  | 1,846,643 |  |  | 348,577 |
Total | 10,865,272 |  |  | 8,978,766 |  |  | 11,725,360 |  |  | 8,920,621 |

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