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Properties, net (Tables) | 9 Months Ended
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Sep. 30, 2014
Real Estate [Abstract] |
Schedule of operating properties, net | Operating properties, net consisted of the following (in thousands):
| September 30, 2014 |  | December 31, 2013
Land | $ | 439,355 |  |  | $ | 430,472 |
Buildings and improvements | 2,997,450 |  |  | 2,869,870 |
Less: accumulated depreciation | (679,598 | ) |  | (597,649 | )
Operating properties, net | $ | 2,757,207 |  |  | $ | 2,702,693 |
Schedule of projects in development or held for future development | Projects in development or held for future development consisted of the following (in thousands):
| September 30, 2014 |  | December 31, 2013
Land | $ | 229,286 |  |  | $ | 245,676 |
Construction in progress, excluding land | 284,663 |  |  | 265,932 |
Projects in development or held for future development | $ | 513,949 |  |  | $ | 511,608 |
Schedule of operating property dispositions | During the nine months ended September 30, 2014, we completed dispositions of the following operating properties (dollars in thousands):
Project Name |  | Location |  | Date of Sale |  | Number of Buildings |  | Total Rentable Square Feet |  | Transaction Value |  | Gain on Disposition
4969 and 4979 Mercantile Road |  | White Marsh, MD |  | 7/14/2014 |  | 2 |  |  | 96,721 |  |  | $ | 5,960 |  |  | $ | 2,126 |
9930 and 9940 Franklin Square |  | White Marsh, MD |  | 7/30/2014 |  | 2 |  |  | 71,992 |  |  | 10,475 |  |  | 2,303 |
5020, 5022, 5024 and 5026 Campbell Boulevard |  | White Marsh, MD |  | 8/4/2014 |  | 4 |  |  | 134,245 |  |  | 12,400 |  |  | 666 |
|  |  |  |  |  | 8 |  |  | 302,958 |  |  | $ | 28,835 |  |  | $ | 5,095 |

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- Definition Tabular disclosure of properties in development or held for future development, which includes amount of land and costs incurred for construction and development. + References No definition available. + Details
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