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)
$ in Millions
1 Months Ended 6 Months Ended
Jul. 31, 2017
USD ($)
Extension
Jun. 30, 2017
USD ($)
Dec. 31, 2016
USD ($)
Schedule of Equity Method Investments [Line Items]      
Differences in basis   $ 3.7 $ 3.7
Mortgages [Member] | Joint Venture [Member]      
Schedule of Equity Method Investments [Line Items]      
Net discount and debt origination costs   1.3 $ 1.6
Galveston/Houston [Member] | Mortgages [Member] | Joint Venture [Member]      
Schedule of Equity Method Investments [Line Items]      
Principal   $ 70.0  
Basis spread on variable rate   1.50%  
Subsequent Event [Member] | Galveston/Houston [Member] | Mortgages [Member] | Joint Venture [Member]      
Schedule of Equity Method Investments [Line Items]      
Principal $ 80.0    
Number of mortgage extensions | Extension 2    
Term of mortgage extension 1 year    
Basis spread on variable rate 1.65%    
Proceeds from Issuance of Debt $ 14.5