Non-controlling Interests (Tables)

12 Months Ended

Dec. 31, 2017

Non-controlling Interest [Line Items]

Non-controlling Interests [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:



(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.