Quarterly report pursuant to Section 13 or 15(d)

Investments in Unconsolidated Real Estate Joint Ventures (Narrative) (Details)

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Investments in Unconsolidated Real Estate Joint Ventures (Narrative) (Details) - USD ($)
$ in Millions
Mar. 31, 2018
Dec. 31, 2017
Schedule of Equity Method Investments [Line Items]    
Differences in basis $ 4.1 $ 4.2