XML 33 R28.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Properties, net (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2012
Real Estate [Abstract] |
Schedule of operating properties, net | Operating properties, net consisted of the following (in thousands):
| June 30, 2012 |  | December 31, 2011
Land | $ | 443,319 |  |  | $ | 472,483 |
Buildings and improvements | 2,748,162 |  |  | 2,801,252 |
Less: accumulated depreciation | (562,345 | ) |  | (559,679 | )
Operating properties, net | $ | 2,629,136 |  |  | $ | 2,714,056 |
Schedule of projects in development or held for future development | Projects we had in development or held for future development consisted of the following (in thousands):
| June 30, 2012 |  | December 31, 2011
Land | $ | 222,577 |  |  | $ | 229,833 |
Construction in progress, excluding land | 380,879 |  |  | 409,086 |
Projects in development or held for future development | $ | 603,456 |  |  | $ | 638,919 |
Schedule of operating property dispositions | We sold the following operating properties during the six months ended June 30, 2012 (dollars in thousands):
Project Name |  | Location |  | Date of Sale |  | Number of Buildings |  | Total Rentable Square Feet |  | Sale Price |  | Gain on Sale
White Marsh Portfolio (1) |  | White Marsh, Maryland |  | 1/30/2012 |  | 5 |  |  | 163,000 |  |  | $ | 19,100 |  |  | $ | 2,445 |
1101 Sentry Gateway |  | San Antonio, Texas |  | 1/31/2012 |  | 1 |  |  | 95,000 |  |  | 13,500 |  |  | 1,747 |
222 and 224 Schilling Circle |  | Hunt Valley, Maryland |  | 2/10/2012 |  | 2 |  |  | 56,000 |  |  | 4,400 |  |  | 102 |
15 and 45 West Gude Drive |  | Rockville, Maryland |  | 5/2/2012 |  | 2 |  |  | 231,000 |  |  | 49,107 |  |  | — |
11800 Tech Road |  | Silver Spring, Maryland |  | 6/14/2012 |  | 1 |  |  | 240,000 |  |  | 21,300 |  |  | — |
|  |  |  |  |  | 11 |  |  | 785,000 |  |  | $ | 107,407 |  |  | $ | 4,294 |
(1) Includes three properties comprising the White Marsh Professional Center, 8615 Ridgely’s Choice and 8114 Sandpiper Circle.
Schedule of impairment losses recognized by period of recognition and by property classification | The table below sets forth the impairment losses recognized in the six months ended June 30, 2012 by period of recognition and by property classification (in thousands):
| Three Months Ended
| June 30, 2012 |  | March 31, 2012 |  | Total
Operating properties | $ | 2,354 |  |  | $ | 11,833 |  |  | $ | 14,187 |
Non-operating properties | — |  |  | (5,246 | ) |  | (5,246 | )
Total | $ | 2,354 |  |  | $ | 6,587 |  |  | $ | 8,941 |

X
- Definition Tabular disclosure of net operating properties that includes carrying amount of properties and accumulated depreciation. + References No definition available. + Details
Name: | ofc_ScheduleOfOperatingPropertiesTableTextBlock
Namespace Prefix: | ofc_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of information pertaining to operating property dispositions during the period, by disposition. + References No definition available. + Details
Name: | ofc_ScheduleOfOperatingPropertyDispositionsTableTextBlock
Namespace Prefix: | ofc_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | ofc_ScheduleOfProjectsInDevelopmentOrHeldForFutureDevelopmentTableTextBlock
Namespace Prefix: | ofc_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure for impairment of long-lived assets held and used by an entity which includes a description of the impaired long-lived asset and facts and circumstances leading to the impairment, aggregate amount of the impairment loss and where the loss is located in the income statement, method(s) for determining fair value, and the segment in which the impaired long-lived asset is reported. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 144 -Paragraph 26 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section CC -Subsection 3 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6391110&loc=d3e2921-110230 + Details
Name: | us-gaap_DetailsOfImpairmentOfLongLivedAssetsHeldAndUsedByAssetTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_RealEstateAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration