Quarterly report pursuant to Section 13 or 15(d)

Properties, net (Details 4)

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Properties, net (Details 4)
3 Months Ended
Mar. 31, 2012
sqfeet
property
Properties under construction
 
Construction and Redevelopment Activities  
Number of real estate properties 6
Square footage of real estate properties (in square feet) 789,000
Properties under construction | Baltimore/Washington Corridor
 
Construction and Redevelopment Activities  
Number of real estate properties 3
Properties under construction | Greater Baltimore
 
Construction and Redevelopment Activities  
Number of real estate properties 1
Properties under construction | Northern Virginia
 
Construction and Redevelopment Activities  
Number of real estate properties 1
Properties under construction | Huntsville
 
Construction and Redevelopment Activities  
Number of real estate properties 1
Properties under redevelopment | Greater Philadelphia
 
Construction and Redevelopment Activities  
Number of real estate properties 1
Square footage of real estate properties (in square feet) 113,000