Quarterly report pursuant to Section 13 or 15(d)

Noncontrolling Interests In Subsidiaries (Narrative) (Details)

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Noncontrolling Interests In Subsidiaries (Narrative) (Details)
$ / shares in Units, $ in Millions
9 Months Ended
Sep. 30, 2015
USD ($)
property
$ / shares
Dec. 31, 2014
Noncontrolling Interest [Line Items]    
Number of common shares received upon redemption of common units | $ / shares $ 1  
Rebalance of ownership percentage | $ $ (0.3)  
Percentage of noncontrolling interest 10.80% 11.10%
Participation Rights [Member]    
Noncontrolling Interest [Line Items]    
Number of properties 3  
Excess net cash flow remaining after the distribution to the Company 50.00%  
Internal rate of return 10.00%  
Future Developments [Member] | Participation Rights [Member]    
Noncontrolling Interest [Line Items]    
Number of properties 1