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Common Stock and Other Equity Related Transactions Common Stock and Other Equity Related Transactions (Tables) | 12 Months Ended
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Dec. 31, 2015
Equity [Abstract] |
Schedule of Common Stock Outstanding Roll Forward | The following table presents the changes in our outstanding common stock for the years ended December 31, 2015, 2014 and 2013 (excluding OP Units of 7,207,678, 7,231,967, and 7,667,723 outstanding at December 31, 2015, 2014 and 2013, respectively):
| 2015 |  | 2014 |  | 2013
Shares outstanding at January 1, | 83,879,779 |  |  | 83,313,677 |  |  | 83,193,310 |
Common stock issued through conversion of OP Units | 24,289 |  |  | 435,756 |  |  | 29,566 |
Common stock issued through exercise of options | 220,000 |  |  | — |  |  | 20,000 |
Common stock issued through stock grants | 158,013 |  |  | 186,666 |  |  | 173,332 |
Common stock issued through ESPP and Dividend Reinvestment Plan | 20,134 |  |  | 31,203 |  |  | 19,013 |
Common stock repurchased and retired | (49,150 | ) |  | (87,523 | ) |  | (121,544 | )
Shares outstanding at December 31, | 84,253,065 |  |  | 83,879,779 |  |  | 83,313,677 |
Dividends Declared | The following regular quarterly distributions have been declared and paid to common stockholders and common OP Unit non-controlling interests since January 1, 2013:
Distribution Amount Per Share |  | For the Quarter Ending |  | Stockholder Record Date |  | Payment Date
$0.2500 |  | March 31, 2013 |  | March 28, 2013 |  | April 12, 2013
$0.2500 |  | June 30, 2013 |  | June 28, 2013 |  | July 12, 2013
$0.2500 |  | September 30, 2013 |  | September 27, 2013 |  | October 11, 2013
$0.2500 |  | December 31, 2013 |  | December 27, 2013 |  | January 10, 2014
$0.3250 |  | March 31, 2014 |  | March 28, 2014 |  | April 11, 2014
$0.3250 |  | June 30, 2014 |  | June 27, 2014 |  | July 11, 2014
$0.3250 |  | September 30, 2014 |  | September 26, 2014 |  | October 10, 2014
$0.3250 |  | December 31, 2014 |  | December 26, 2014 |  | January 9, 2015
$0.3750 |  | March 31, 2015 |  | March 27, 2015 |  | April 10, 2015
$0.3750 |  | June 30, 2015 |  | June 26, 2015 |  | July 10, 2015
$0.3750 |  | September 30, 2015 |  | September 25, 2015 |  | October 9, 2015
$0.3750 |  | December 31, 2015 |  | December 28, 2015 |  | January 8, 2016

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