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Non-controlling Interests | 12 Months Ended
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Dec. 31, 2014
Noncontrolling Interest [Line Items] |
Noncontrolling Interest Disclosure [Text Block] | 14. Non-controlling Interests 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 The entire disclosure for noncontrolling interest in consolidated subsidiaries, which could include the name of the subsidiary, the ownership percentage held by the parent, the ownership percentage held by the noncontrolling owners, the amount of the noncontrolling interest, the location of this amount on the balance sheet (when not reported separately), an explanation of the increase or decrease in the amount of the noncontrolling interest, the noncontrolling interest share of the net Income or Loss of the subsidiary, the location of this amount on the income statement (when not reported separately), the nature of the noncontrolling interest such as background information and terms, the amount of the noncontrolling interest represented by preferred stock, a description of the preferred stock, and the dividend requirements of the preferred stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.31) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4573702-111684 + Details
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