|
Organization And Basis Of Presentation (Details)
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9 Months Ended |
|
Sep. 30, 2012
state
sqft
property
|
| Real Estate Properties [Line Items] |
|
| Number of properties owned or investment interests |
276 |
| Aggregate square feet of the property owned or investment interest |
32,200,000 |
| Number of states where properties are located |
5 |
|
Office And Office/Flex Buildings [Member]
|
|
| Real Estate Properties [Line Items] |
|
| Number of properties owned or investment interests |
264 |
| Aggregate square feet of the property owned or investment interest |
31,800,000 |
|
Unconsolidated Joint Ventures [Member]
|
|
| Real Estate Properties [Line Items] |
|
| Number of properties owned or investment interests |
8 |
| Aggregate square feet of the property owned or investment interest |
1,200,000 |
|
Industrial/Warehouse Facilities [Member]
|
|
| Real Estate Properties [Line Items] |
|
| Number of properties owned or investment interests |
6 |
| Aggregate square feet of the property owned or investment interest |
387,400 |
|
Retail [Member]
|
|
| Real Estate Properties [Line Items] |
|
| Number of properties owned or investment interests |
2 |
| Aggregate square feet of the property owned or investment interest |
17,300 |
|
Hotel [Member]
|
|
| Real Estate Properties [Line Items] |
|
| Number of properties owned or investment interests |
1 |
|
Land [Member]
|
|
| Real Estate Properties [Line Items] |
|
| Number of properties owned or investment interests |
3 |