|
Assets Held for Sale and Discontinued Operations (Details Textual)
|
6 Months Ended | 12 Months Ended |
|---|---|---|
|
Jun. 30, 2012
sqft
Property
|
Dec. 31, 2011
sqft
Property
|
|
| Assets Held for Sale and Discontinued Operations (Textual)[Abstract] | ||
| Properties classified as held for sale | 5 | |
| Number of properties sold to third parties | 95 | 94 |
| Net square feet sold to third parties | 11,900,000 | 10,700,000 |