XML 72 R14.htm IDEA: XBRL DOCUMENT
v3.2.0.727

Intangible Assets on Real Estate Acquisition, Net | 6 Months Ended
--- | ---
Jun. 30, 2015
Intangible Assets on Real Estate Acquisitions [Abstract] |
Intangible Assets on Real Estate Acquisition, Net | Intangible Assets on Real Estate Acquisitions, Net Intangible assets on real estate acquisitions consisted of the following, excluding amounts for properties held for sale (in thousands):
|  | June 30, 2015 |  | December 31, 2014
|  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
In-place lease value |  | $ | 134,387 |  |  | $ | 95,910 |  |  | $ | 38,477 |  |  | $ | 123,759 |  |  | $ | 101,040 |  |  | $ | 22,719 |
Tenant relationship value |  | 58,560 |  |  | 27,666 |  |  | 30,894 |  |  | 42,301 |  |  | 28,492 |  |  | 13,809 |
Below-market cost arrangements |  | 12,415 |  |  | 6,324 |  |  | 6,091 |  |  | 12,415 |  |  | 5,984 |  |  | 6,431 |
Above-market leases |  | 14,344 |  |  | 8,467 |  |  | 5,877 |  |  | 8,659 |  |  | 8,159 |  |  | 500 |
Market concentration premium |  | 1,333 |  |  | 944 |  |  | 389 |  |  | 1,333 |  |  | 938 |  |  | 395 |
|  | $ | 221,039 |  |  | $ | 139,311 |  |  | $ | 81,728 |  |  | $ | 188,467 |  |  | $ | 144,613 |  |  | $ | 43,854 |
Amortization of the intangible asset categories set forth above totaled $7.0 million in the six months ended June 30, 2015 and $7.4 million in the six months ended June 30, 2014. The approximate weighted average amortization periods of the categories set forth above follow (excluding amounts for properties held for sale): in-place lease value: five years; tenant relationship value: nine years; below-market cost arrangements: 32 years; above-market leases: four years; and market concentration premium: 27 years. The approximate weighted average amortization period for all of the categories combined is nine years. Estimated amortization expense associated with the intangible asset categories set forth above through 2020 follows (excluding amounts for properties held for sale): $8.6 million for the six months ending December 31, 2015; $16.6 million for 2016; $14.3 million for 2017; $9.5 million for 2018; $6.7 million for 2019; and $5.1 million for 2020.

X
- Definition Intangible Assets on Real Estate Acquisitions [Abstract] + References No definition available. + Details
Name: | ofc_IntangibleAssetsonRealEstateAcquisitionsAbstract
Namespace Prefix: | ofc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16373-109275 + Details
Name: | us-gaap_IntangibleAssetsDisclosureTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration