Quarterly report pursuant to Section 13 or 15(d)

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

v3.8.0.1
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, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Numerator:        
Net income (loss) attributable to COPT $ 20,916 $ 27,299 $ 60,133 $ (13,294)
Preferred share/unit dividends/distributions 0 (3,552) (6,219) (10,657)
Issuance costs associated with redeemed preferred shares 0 0 (6,847) 0
Income attributable to share-based compensation awards (95) (105) (337) (319)
Numerator for basic and diluted EPS on net income (loss) attributable to COPT common shareholders $ 20,821 $ 23,642 $ 46,730 $ (24,270)
Denominator (all weighted averages):        
Denominator for basic EPS (common shares) 99,112 94,433 98,855 94,312
Dilutive effect of share-based compensation awards (shares) 146 81 154 0
Denominator for diluted EPS (common shares) 99,258 94,514 99,009 94,312
Basic EPS:        
Net income (loss) attributable to COPT common shareholders - basic (in dollars per share/unit) $ 0.21 $ 0.25 $ 0.47 $ (0.26)
Diluted EPS:        
Net income (loss) attributable to COPT common shareholders - diluted (in dollars per share/unit) $ 0.21 $ 0.25 $ 0.47 $ (0.26)
Corporate Office Properties, L.P.        
Numerator:        
Net income (loss) attributable to COPT $ 21,785 $ 28,359 $ 62,239 $ (13,751)
Preferred share/unit dividends/distributions (165) (3,717) (6,714) (11,152)
Issuance costs associated with redeemed preferred shares 0 0 (6,847) 0
Income attributable to share-based compensation awards (95) (105) (337) (319)
Numerator for basic and diluted EPS on net income (loss) attributable to COPT common shareholders $ 21,525 $ 24,537 $ 48,341 $ (25,222)
Denominator (all weighted averages):        
Denominator for basic EPS (common shares) 102,462 98,024 102,255 97,960
Dilutive effect of share-based compensation awards (shares) 146 81 154 0
Denominator for diluted EPS (common shares) 102,608 98,105 102,409 97,960
Basic EPS:        
Net income (loss) attributable to COPT common shareholders - basic (in dollars per share/unit) $ 0.21 $ 0.25 $ 0.47 $ (0.26)
Diluted EPS:        
Net income (loss) attributable to COPT common shareholders - diluted (in dollars per share/unit) $ 0.21 $ 0.25 $ 0.47 $ (0.26)