Quarterly report pursuant to Section 13 or 15(d)

Organization (Details 2)

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Organization (Details 2) - Corporate Office Properties, L.P.
6 Months Ended
Jun. 30, 2015
Common Units  
Forms of ownership in Operating Partnership and ownership percentage by the entity  
Percentage ownership in operating partnership 96.30%
Preferred Units  
Forms of ownership in Operating Partnership and ownership percentage by the entity  
Percentage ownership in operating partnership 95.50%