Quarterly report pursuant to Section 13 or 15(d)

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

v3.10.0.1
Earnings Per Share ("EPS") and Earnings Per Unit ("EPU") (Details 2) - shares
shares in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Conversion of common units        
Antidilutive securities        
Antidilutive securities excluded from computation of diluted earnings per share (in shares) 2,135 3,350 2,847 3,400
Conversion of Series I preferred units        
Antidilutive securities        
Antidilutive securities excluded from computation of diluted earnings per share (in shares) 176 176 176 176
Weighted average restricted shares/units and deferred shares        
Antidilutive securities        
Antidilutive securities excluded from computation of diluted earnings per share (in shares) 455 445 452 431
Weighted average options        
Antidilutive securities        
Antidilutive securities excluded from computation of diluted earnings per share (in shares) 30 40 45 80
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) 176 176 176 176
Corporate Office Properties, L.P. | Weighted average restricted shares/units and deferred shares        
Antidilutive securities        
Antidilutive securities excluded from computation of diluted earnings per share (in shares) 455 445 452 431
Corporate Office Properties, L.P. | Weighted average options        
Antidilutive securities        
Antidilutive securities excluded from computation of diluted earnings per share (in shares) 30 40 45 80