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Equity and Accumulated Other Comprehensive Loss, Net (Tables) | 9 Months Ended
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Sep. 30, 2018
Equity [Abstract] |
Ownership Interest In The Operating Partnership | The following table shows the ownership interests in the Operating Partnership as of September 30, 2018 and December 31, 2017:
| September 30, 2018 |  | December 31, 2017
| Number of units |  | Percentage of total |  | Number of units |  | Percentage of total
Digital Realty Trust, Inc. | 206,267,055 |  |  | 96.1 | % |  | 205,470,300 |  |  | 96.0 | %
Noncontrolling interests consist of: |  |  |  |  |  |  |
Common units held by third parties | 6,411,484 |  |  | 3.0 | % |  | 6,899,094 |  |  | 3.2 | %
Incentive units held by employees and directors (see Note 14) | 1,929,103 |  |  | 0.9 | % |  | 1,590,001 |  |  | 0.8 | %
| 214,607,642 |  |  | 100.0 | % |  | 213,959,395 |  |  | 100.0 | %
Summary of Activity for Noncontrolling Interests in the Operating Partnership | The following table shows activity for the noncontrolling interests in the Operating Partnership for the nine months ended September 30, 2018:
| Common Units |  | Incentive Units |  | Total
As of December 31, 2017 | 6,899,094 |  |  | 1,590,001 |  |  | 8,489,095 |
Redemption of common units for shares of Digital Realty Trust, Inc. common stock (1) | (487,610 | ) |  | — |  |  | (487,610 | )
Conversion of incentive units held by employees and directors for shares of Digital Realty Trust, Inc. common stock (1) | — |  |  | (80,182 | ) |  | (80,182 | )
Incentive units issued upon achievement of market performance condition | — |  |  | 326,947 |  |  | 326,947 |
Grant of incentive units to employees and directors | — |  |  | 114,472 |  |  | 114,472 |
Cancellation / forfeitures of incentive units held by employees and directors | — |  |  | (22,135 | ) |  | (22,135 | )
As of September 30, 2018 | 6,411,484 |  |  | 1,929,103 |  |  | 8,340,587 |
(1) | Redemption of common units were recorded as a reduction to noncontrolling interests in the Operating Partnership and an increase to common stock and additional paid in capital based on the book value per unit in the accompanying condensed consolidated balance sheet of Digital Realty Trust, Inc.
Schedule of Dividends | We have declared and paid the following dividends on our common and preferred stock for the nine months ended September 30, 2018 (in thousands, except per share data):
Date dividend declared | Dividend payment date |  | Series C Preferred Stock |  | Series G Preferred Stock |  | Series H Preferred Stock |  | Series I Preferred Stock |  | Series J Preferred Stock |  | Common Stock
March 1, 2018 | March 30, 2018 |  | $ | 3,333 |  |  | $ | 3,672 |  |  | $ | 6,730 |  |  | $ | 3,969 |  |  | $ | 2,625 |  |  | $ | 208,015 |
May 8, 2018 | June 29, 2018 |  | 3,333 |  |  | 3,672 |  |  | 6,730 |  |  | 3,969 |  |  | 2,625 |  |  | 208,071 |
August 14, 2018 | September 28, 2018 |  | 3,333 |  |  | 3,672 |  |  | 6,730 |  |  | 3,969 |  |  | 2,625 |  |  | 208,166 |
|  |  | $ | 9,999 |  |  | $ | 11,016 |  |  | $ | 20,190 |  |  | $ | 11,907 |  |  | $ | 7,875 |  |  | $ | 624,252 |
Annual rate of dividend per share |  |  | $ | 1.65625 |  |  | $ | 1.46875 |  |  | $ | 1.84375 |  |  | $ | 1.58750 |  |  | $ | 1.31250 |  |  | $ | 4.04000 |
Schedule of Accumulated Other Comprehensive Income, Net | The accumulated balances for each item within other comprehensive income (loss), net are as follows (in thousands):
| Foreign currency translation adjustments |  | Cash flow hedge adjustments |  | Foreign currency net investment hedge adjustments |  | Accumulated other comprehensive income (loss), net
Balance as of December 31, 2017 | $ | (147,370 | ) |  | $ | 13,200 |  |  | $ | 25,738 |  |  | $ | (108,432 | )
Net current period change | (8,272 | ) |  | 15,705 |  |  | — |  |  | 7,433 |
Reclassification to interest expense from interest rate swaps | — |  |  | (2,202 | ) |  | — |  |  | (2,202 | )
Balance as of September 30, 2018 | $ | (155,642 | ) |  | $ | 26,703 |  |  | $ | 25,738 |  |  | $ | (103,201 | )

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