Annual report pursuant to Section 13 and 15(d)

Organization (Details)

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Organization (Details)
 12 Months Ended
Dec. 31, 2013
sqft
acre
Operating office properties
  
Investments in real estate  
Number of real estate properties 183
Square footage of real estate properties (in square feet) 17,400,000
Office properties under, or contractually committed for, construction or approved for redevelopment
  
Investments in real estate  
Number of real estate properties 10
Square footage of real estate properties (in square feet) 1,400,000
Office properties under construction or redevelopment which are partially operational
  
Investments in real estate  
Number of real estate properties 2
Land held or under pre-construction
  
Investments in real estate  
Area of land held or under pre-construction (in acres) 1,708
Area of land parcels controlled but not owned (in acres) 56
Developable square footage of real estate properties (in square feet) 20,000,000
Partially operational, wholesale data center
  
Investments in real estate  
The expected stabilization critical load after completion of development (in megawatts) 18