Organization (Details 2) - Corporate Office Properties, L.P. [Member] |
12 Months Ended |
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Dec. 31, 2015 | |
| Common Units [Member] | |
| Forms of ownership in Operating Partnership and ownership percentage by the entity | |
| Percentage ownership in operating partnership | 96.30% |
| Preferred Units [Member] | |
| Forms of ownership in Operating Partnership and ownership percentage by the entity | |
| Percentage ownership in operating partnership | 95.50% |
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- Definition Line items related to the percentage of classes of ownership in a subsidiary that are owned by the parent. No definition available.
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- Definition Percentage investment held by the managing member or general partner of the limited liability company (LLC) or limited partnership (LP). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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