Quarterly report pursuant to Section 13 or 15(d)

Organization And Basis Of Presentation (Details)

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Organization And Basis Of Presentation (Details)
6 Months Ended
Jun. 30, 2011
sqft
Number of property owned or investment interest 278
Aggregate square feet of the property owned or investment interest 32,400,000
Number of locations of properties 5
Office And Office/Flex Buildings [Member]
 
Number of property owned or investment interest 266
Aggregate square feet of the property owned or investment interest 32,000,000
Office Buildings [Member]
 
Number of property owned or investment interest 8
Aggregate square feet of the property owned or investment interest 1,200,000
Industrial/Warehouse Facilities [Member]
 
Number of property owned or investment interest 6
Aggregate square feet of the property owned or investment interest 387,400
Retail [Member]
 
Number of property owned or investment interest 2
Aggregate square feet of the property owned or investment interest 17,300
Hotels [Member]
 
Number of property owned or investment interest 1
Land Leased [Member]
 
Number of property owned or investment interest 3