Quarterly report pursuant to Section 13 or 15(d)

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

v3.10.0.1
Earnings Per Share ("EPS") and Earnings Per Unit ("EPU") (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Numerator:        
Net income attributable to COPT/COPLP $ 18,697 $ 20,579 $ 55,281 $ 59,124
Preferred share/unit dividends/distributions 0 0 0 (6,219)
Issuance costs associated with redeemed preferred shares/units 0 0 0 (6,847)
Income attributable to share-based compensation awards (114) (95) (348) (337)
Numerator for basic and diluted EPS on net income attributable to COPT/COPLP common share/unit holders $ 18,583 $ 20,484 $ 54,933 $ 45,721
Denominator (all weighted averages):        
Denominator for basic EPS/EPU (common shares/units) 104,379 99,112 102,401 98,855
Dilutive effect of share-based compensation awards 231 146 165 154
Dilutive effect of forward equity sale agreements 178 0 60 0
Denominator for diluted EPS/EPU (common shares/units) 104,788 99,258 102,626 99,009
Basic EPS:        
Net income attributable to COPT/COPLP common shareholders - basic (in dollars per share/unit) $ 0.18 $ 0.21 $ 0.54 $ 0.46
Diluted EPS:        
Net income attributable to COPT/COPLP common shareholders - diluted (in dollars per share/unit) $ 0.18 $ 0.21 $ 0.54 $ 0.46
Corporate Office Properties, L.P.        
Numerator:        
Net income attributable to COPT/COPLP $ 19,242 $ 21,437 $ 57,308 $ 61,195
Preferred share/unit dividends/distributions (165) (165) (495) (6,714)
Issuance costs associated with redeemed preferred shares/units 0 0 0 (6,847)
Income attributable to share-based compensation awards (114) (95) (348) (337)
Numerator for basic and diluted EPS on net income attributable to COPT/COPLP common share/unit holders $ 18,963 $ 21,177 $ 56,465 $ 47,297
Denominator (all weighted averages):        
Denominator for basic EPS/EPU (common shares/units) 106,514 102,462 105,248 102,255
Dilutive effect of share-based compensation awards 231 146 165 154
Dilutive effect of forward equity sale agreements 178 0 60 0
Denominator for diluted EPS/EPU (common shares/units) 106,923 102,608 105,473 102,409
Basic EPS:        
Net income attributable to COPT/COPLP common shareholders - basic (in dollars per share/unit) $ 0.18 $ 0.21 $ 0.54 $ 0.46
Diluted EPS:        
Net income attributable to COPT/COPLP common shareholders - diluted (in dollars per share/unit) $ 0.18 $ 0.21 $ 0.54 $ 0.46