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Non-controlling Interests (Tables) | 12 Months Ended
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Dec. 31, 2014
Noncontrolling Interest [Line Items] |
Redeemable Noncontrolling Interest [Table Text Block] | The following table summarizes the effect of changes in our ownership interest in subsidiaries on the equity attributable to common shareholders for each of the years ended December 31:
| 2014 |  | 2013 |  | 2012
Net income attributable to common shareholders | $ | 292,089 |  |  | $ | 336,364 |  |  | $ | 283,390 |
Transfers from the non-controlling interests: |  |  |  |  |
Increase in equity for conversion and redemption of operating partnership units | 52 |  |  | 52 |  |  | 8,994 |
Decrease in additional paid-in-capital for acquisition of remaining non-controlling interests in three consolidated joint ventures (1) | — |  |  | — |  |  | (19,549 | )
Change in common equity and net transfers from non-controlling interests | $ | 292,141 |  |  | $ | 336,416 |  |  | $ | 272,835 |
(1) During the year ended December 31, 2012, we purchased the remaining non-controlling ownership interest in three fully consolidated joint ventures, comprised of 680 units located in Houston, Texas and Charlotte, North Carolina.

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- Definition Tabular disclosure of redeemable noncontrolling interest (as defined) included in the statement of financial position as either a liability or temporary equity. As of the date of the statement of financial position, such redeemable noncontrolling interest is currently redeemable, as defined, for cash or other assets of the entity at (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the entity. + References No definition available. + Details
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