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Common Shares (Tables) (2012 ATM Program [Member]) | 9 Months Ended
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Sep. 30, 2014
2012 ATM Program [Member] |
Activity Under At-The-Market Share Offering Program | The following table presents activity under our 2012 ATM program for the three and nine months ended September 30, 2014 and 2013.
| Three Months Ended |  | Nine Months Ended
| September 30, |  | September 30,
(in thousands, except per share amounts) | 2014 |  | 2013 |  | 2014 |  | 2013
Total net consideration | $ | 50,535.3 |  |  | $ | — |  |  | $ | 50,535.3 |  |  | $ | 40,097.6 |
Common shares sold | 688.3 |  |  | — |  |  | 688.3 |  |  | 555.1 |
Average price per share | $ | 74.60 |  |  | $ | — |  |  | $ | 74.60 |  |  | $ | 73.73 |

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- Definition Activity Under ATM Share Offering Program. + References No definition available. + Details
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