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Non-controlling Interests | 12 Months Ended
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Dec. 31, 2017
Non-controlling Interest [Line Items] |
Non-controlling Interests [Text Block] | 15. 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:
(in thousands) | 2017 |  | 2016 |  | 2015
Net income attributable to common shareholders | $ | 196,422 |  |  | $ | 819,823 |  |  | $ | 249,315 |
Transfers from non-controlling interests: |  |  |  |  |
Increase in equity for conversion of operating partnership units | 117 |  |  | 290 |  |  | 86 |
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 | $ | 196,539 |  |  | $ | 820,113 |  |  | $ | 239,921 |
(1) | See Note 7, "Acquisitions, Dispositions, and Discontinued Operations" for a further discussion of this acquisition of non-controlling ownership interest.

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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 810 -URI http://asc.fasb.org/topic&trid=2197479 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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