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
3 Months Ended
Mar. 31, 2016
Jun. 30, 2015
Dec. 31, 2015
Schedule of Equity Method Investments [Line Items]      
Differences in basis $ 4.1   $ 3.9
Savannah [Member]      
Schedule of Equity Method Investments [Line Items]      
Economic interest percentage in joint venture 98.00%    
Columbus [Member]      
Schedule of Equity Method Investments [Line Items]      
Payments to acquire land   $ 8.9  
Company Portion of Contributed Capital to the Joint Venture $ 30.0    
Partner's Portion of Contributed Capital to the Joint Venture 30.0    
Mortgages [Member]      
Schedule of Equity Method Investments [Line Items]      
Net of debt origination costs and including premiums $ 2.8   $ 3.3