Annual report pursuant to Section 13 and 15(d)

Earnings Per Share ("EPS") and Earnings Per Unit (“EPU”) (Details 2)

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Earnings Per Share ("EPS") and Earnings Per Unit (“EPU”) (Details 2)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Conversion of common units
     
Antidilutive securities      
Antidilutive securities excluded from computation of diluted earnings per share (in shares) 3,869 4,235 4,355
Conversion of Series I preferred units
     
Antidilutive securities      
Antidilutive securities excluded from computation of diluted earnings per share (in shares) 176 176 176
Conversion of Series K preferred shares
     
Antidilutive securities      
Antidilutive securities excluded from computation of diluted earnings per share (in shares) 434 434 434
Restricted Stock
     
Antidilutive securities      
Antidilutive securities excluded from computation of diluted earnings per share (in shares) 385 461 638
Stock Options
     
Antidilutive securities      
Antidilutive securities excluded from computation of diluted earnings per share (in shares) 636 772 712
Corporate Office Properties, L.P. | Restricted Stock
     
Antidilutive securities      
Antidilutive securities excluded from computation of diluted earnings per share (in shares) 385 461 638
Corporate Office Properties, L.P. | Stock Options
     
Antidilutive securities      
Antidilutive securities excluded from computation of diluted earnings per share (in shares) 636 772 712
Corporate Office Properties, L.P. | Conversion of Series I preferred units
     
Antidilutive securities      
Antidilutive securities excluded from computation of diluted earnings per share (in shares) 176 176 176
Corporate Office Properties, L.P. | Conversion of Series K preferred units
     
Antidilutive securities      
Antidilutive securities excluded from computation of diluted earnings per share (in shares) 434 434 434