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Non-controlling Interests Non-controlling Interests (Tables) | 3 Months Ended
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Mar. 31, 2015
Noncontrolling Interests [Abstract] |
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 the periods indicated:
|  | Three Months Ended
|  | March 31,
(in thousands) |  | 2015 |  | 2014
Net income attributable to common shareholders |  | $ | 115,599 |  |  | 40,036 |
Transfers from non-controlling interests: |  |  |  |
Increase in equity for conversion of operating partnership units |  | 16 |  |  | — |
Decrease in additional paid-in capital for purchase of remaining non-controlling ownership interests in two consolidated joint ventures (1) |  | (9,480 | ) |  | — |
Change in common equity and net transfers from non-controlling interests |  | $ | 106,135 |  |  | $ | 40,036 |
(1) | Refer to Note 5, "Acquisitions and Dispositions," for further discussion of acquisitions.

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- Definition The tabular disclosure of the effects of any changes in a parent's ownership interest in a subsidiary on the equity attributable to the parent if the ownership interests in a subsidiary changes during the period. The changes represented by this element did not result in the deconsolidation of the subsidiary. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4573702-111684 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4M -URI http://asc.fasb.org/extlink&oid=35736750&loc=SL4591554-111686 + Details
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