Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation (Details)

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Basis of Presentation (Details) - USD ($)
$ in Millions
Mar. 31, 2016
Dec. 31, 2015
Savannah [Member]    
Schedule of Equity Method Investments [Line Items]    
Equity method investments [1] $ 43.8 $ 44.4
Southaven [Member]    
Schedule of Equity Method Investments [Line Items]    
Assets 82.8  
Liabilities 57.1  
Total rental property, net 79.2  
Cash and cash equivalents 1.5  
Other assets (including deferred lease costs and other intangibles ) 2.1  
Accounts Payable and accrued expenses 4.7  
Book value of debt $ 51.5  
Accounting Standards Update 2015-03 [Member] | Assets, Total [Member]    
Schedule of Equity Method Investments [Line Items]    
Deferred Finance Costs, Net   11.9
Accounting Standards Update 2015-03 [Member] | Liabilities, Total [Member]    
Schedule of Equity Method Investments [Line Items]    
Deferred Finance Costs, Net   $ 11.9
[1] Based on capital contribution and distribution provisions in the joint venture agreement, we expect our economic interest in the venture's cash flow to be greater than indicated in the Ownership column, which states our legal interest in this venture. As of March 31 2016, based upon the liquidation proceeds we would receive from a hypothetical liquidation of our investment based on depreciated book value, our estimated economic interest in the venture was approximately 98%. Our economic interest may fluctuate based on a number of factors, including mortgage financing, partnership capital contributions and distributions, and proceeds from gains or losses of asset sales.