Quarterly report pursuant to Section 13 or 15(d)

Investments In Unconsolidated Joint Ventures (Stamford SM LLC) (Details)

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Investments In Unconsolidated Joint Ventures (Stamford SM LLC) (Details) (USD $)
In Millions, unless otherwise specified
 0 Months Ended 6 Months Ended
Feb. 17, 2012
Class A Portfolio In Stamford, Connecticut [Member]
sqft
Feb. 17, 2012
Class A Office Space [Member]
property
sqft
Feb. 17, 2012
Residential Space [Member]
property
sqft
Jun. 30, 2012
Stamford SM LLC [Member]
Jun. 30, 2012
Mezz Loan [Member]
item
Feb. 17, 2012
Mezz Loan [Member]
Schedule of Equity Method Investments [Line Items]            
Area of office property, square feet 1,700,000 1,670,000 70,500      
Venture property acquisition cost $ 40          
Mortgage loan face amount           50.0
Number of properties   7        
Number of rental units     106      
Mortgage loan carrying amount         41.0  
Threshold of which excess proceeds are paid to another party         $ 47  
Spread over LIBOR         325  
Previous maturity date of mortgage loan         Aug. 01, 2012  
Number of extension options         2  
Mortgage loan, extension period         1 year  
Percentage of interest in venture       80.00%    
Third party ownership percentage       20.00%    
Mortgage loan scheduled to mature         Aug. 01, 2013  
Holding and distribution pattern under operating agreement       The operating agreement of Stamford SM provides, among other things, distributions of net available cash in accordance with its members' respective ownership percentages. The Company owns an 80 percent interest in the venture. The Company and the 20 percent member share equally decision-making on all major decisions involving the operations of the joint venture.