Quarterly report pursuant to Section 13 or 15(d)

Investments In Unconsolidated Joint Ventures (12 Vreeland Associates, L.L.C.) (Narrative) (Details)

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Investments In Unconsolidated Joint Ventures (12 Vreeland Associates, L.L.C.) (Narrative) (Details) (12 Vreeland Associates, L.L.C. [Member], USD $)
In Millions, unless otherwise specified
3 Months Ended 12 Months Ended
Mar. 31, 2014
sqft
Dec. 31, 2013
12 Vreeland Associates, L.L.C. [Member]
   
Schedule of Equity Method Investments [Line Items]    
Percentage of interest in venture 50.00%  
Area of property (in square feet) 139,750  
Distribution of loan proceeds   $ 14.8
Share of distribution of loan proceeds   7.4
Mortgage loans, carrying amount $ 15.1  
Interest rate 2.87%  
Mortgage loan, maturity date July 2023