Annual report pursuant to Section 13 and 15(d)

Earnings Per Share ("EPS") and Earnings Per Unit (???EPU???) (Anti-Dilutive Securities) (Details)

v3.20.4
Earnings Per Share ("EPS") and Earnings Per Unit (“EPU”) (Anti-Dilutive Securities) (Details) - shares
shares in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Conversion of common units      
Antidilutive securities      
Weighted average antidilutive securities excluded from computation of diluted earnings per share (in shares/units) 1,236 1,299 2,468
Conversion of redeemable noncontrolling interests      
Antidilutive securities      
Weighted average antidilutive securities excluded from computation of diluted earnings per share (in shares/units) 957 896 936
Conversion of Series I preferred units      
Antidilutive securities      
Weighted average antidilutive securities excluded from computation of diluted earnings per share (in shares/units) 171 176 176
Weighted average restricted shares/units and deferred share awards      
Antidilutive securities      
Weighted average antidilutive securities excluded from computation of diluted earnings per share (in shares/units) 430 441 452
Weighted average unvested TB-PIUs      
Antidilutive securities      
Weighted average antidilutive securities excluded from computation of diluted earnings per share (in shares/units) 89 51  
Weighted average options      
Antidilutive securities      
Weighted average antidilutive securities excluded from computation of diluted earnings per share (in shares/units)   12 42
Weighted average shares related to forward equity sale agreements      
Antidilutive securities      
Weighted average antidilutive securities excluded from computation of diluted earnings per share (in shares/units)   376  
Corporate Office Properties, L.P | Conversion of redeemable noncontrolling interests      
Antidilutive securities      
Weighted average antidilutive securities excluded from computation of diluted earnings per share (in shares/units) 957 896 936
Corporate Office Properties, L.P | Conversion of Series I preferred units      
Antidilutive securities      
Weighted average antidilutive securities excluded from computation of diluted earnings per share (in shares/units) 171 176 176
Corporate Office Properties, L.P | Weighted average restricted shares/units and deferred share awards      
Antidilutive securities      
Weighted average antidilutive securities excluded from computation of diluted earnings per share (in shares/units) 430 441 452
Corporate Office Properties, L.P | Weighted average unvested TB-PIUs      
Antidilutive securities      
Weighted average antidilutive securities excluded from computation of diluted earnings per share (in shares/units) 89 51  
Corporate Office Properties, L.P | Weighted average options      
Antidilutive securities      
Weighted average antidilutive securities excluded from computation of diluted earnings per share (in shares/units)   12 42
Corporate Office Properties, L.P | Weighted average shares related to forward equity sale agreements      
Antidilutive securities      
Weighted average antidilutive securities excluded from computation of diluted earnings per share (in shares/units)   376