Quarterly report pursuant to Section 13 or 15(d)

Organization (Details)

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Organization (Details)
 6 Months Ended
Jun. 30, 2013
sqft
acre
Operating office properties
  
Investments in real estate  
Number of real estate properties 210
Square footage of real estate properties (in square feet) 19,000,000
Office properties under construction, redevelopment or for which contractual commitments to construct were in place
  
Investments in real estate  
Number of real estate properties 12
Square footage of real estate properties (in square feet) 1,700,000
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) 1,687
Area of land parcels controlled but not owned (in acres) 561
Developable square footage of real estate properties (in square feet) 19,500,000
Partially operational, wholesale data center
  
Investments in real estate  
The expected stabilization critical load after completion of development (in megawatts) 18