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Non-controlling Interests (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Jun. 30, 2014
Non-controlling Interests [Abstract] |  |  |  |  |
Net income attributable to common shareholders |  | $ 36,079 | $ 35,272 | $ 151,678 | $ 75,308
Increase in equity for conversion of operating partnership units |  |  |  | 16 | 0
Decrease in additional paid-in capital for purchase of remaining non-controlling ownership interests in two consolidated joint ventures (1) | [1] |  |  | (9,480) | 0
Change in common shareholders' equity and net transfers from noncontrolling interests |  |  |  | $ 142,214 | $ 75,308
[1] | Refer to Note 5, "Acquisitions, Dispositions, and Impairment," for further discussion of acquisitions.

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