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Noncontrolling Interest Represented by Preferred Operating Partnership Units (Tables)
9 Months Ended
Sep. 30, 2018
Noncontrolling Interest [Abstract]  
Summary of Noncontrolling Interests by Operating Partnership Preferred Units
As of September 30, 2018, the noncontrolling interests represented by Operating Partnership preferred units consisted of the following:
Series A Units
875,480

Series B Units
1,676,087

Series C Units
704,016

Series D Units
3,682,521