XML 31 R25.htm IDEA: XBRL DOCUMENT ﻿
v2.3.0.11

Properties, net (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2011
Properties, net |
Schedule of components of net operating properties |
|  | June 30, |  | December 31, |
|  | 2011 |  | 2010 |
Land |  | $ | 491,188 |  | $ | 501,210 |
Buildings and improvements |  | 2,777,861 |  | 2,804,595 |
Less: accumulated depreciation |  | (527,616 | ) | (503,032 | )
Operating properties, net |  | $ | 2,741,433 |  | $ | 2,802,773 |
Schedule of components of projects under construction or development |
|  | June 30, |  | December 31, |
|  | 2011 |  | 2010 |
Land |  | $ | 248,647 |  | $ | 256,487 |
Construction in progress, excluding land |  | 407,674 |  | 386,195 |
Properties under construction or development |  | $ | 656,321 |  | $ | 642,682 |
Schedule of properties classified as held for sale |
As of June 30, 2011, we had 17 operating properties and a recently redeveloped property included in the Strategic Reallocation Plan classified as held for sale that consisted of the following (in thousands):
Land, operating properties |  | $ | 10,343 |
Land, development |  | 5,599 | (1)
Buildings and improvements |  | 43,022 |
Construction in progress, excluding land |  | 22,934 | (1)
Less: accumulated depreciation |  | (6,791 | )
Properties held for sale, net |  | $ | 75,107 |
(1) Pertains to a property nearing completion of redevelopment.

X
- Details
Name: | ofc_PropertiesNetDisclosureAbstract
Namespace Prefix: | ofc
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of net operating properties that includes carrying amount of properties and accumulated depreciation. + Details
Name: | ofc_ScheduleOfOperatingPropertiesTableTextBlock
Namespace Prefix: | ofc
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of properties under construction or development that includes amount of land and costs incurred for construction and development, excluding land. + Details
Name: | ofc_ScheduleOfPropertiesUnderConstructionOrDevelopmentTableTextBlock
Namespace Prefix: | ofc
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of properties classified as held for sale that includes carrying amount of properties and accumulated depreciation. + Details
Name: | ofc_ScheduleOfRealEstatePropertiesHeldForSaleTableTextBlock
Namespace Prefix: | ofc
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration