Quarterly report pursuant to Section 13 or 15(d)

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

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Earnings Per Share ("EPS") and Earnings Per Unit ("EPU") (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Numerator:        
Income from continuing operations $ 13,727 $ 10,974 $ 28,635 $ 22,404
Gain on sales of real estate, net 10,630 0 10,630 2,683
Preferred share/unit dividends/distributions (3,553) (4,490) (12,387) (15,481)
Issuance costs associated with redeemed preferred shares 0 0 (1,769) (2,904)
Income from continuing operations attributable to noncontrolling interests (1,820) (1,456) (3,923) (2,710)
Income from continuing operations attributable to restricted shares (103) (97) (332) (317)
Numerator for basic and diluted EPS from continuing operations attributable to COPT common shareholders 18,881 4,931 20,854 3,675
Discontinued operations 191 (12,974) 4 (16,215)
Discontinued operations attributable to noncontrolling interests (8) 492 5 529
Numerator for basic and diluted EPS on net income (loss) attributable to COPT common shareholders 19,064 (7,551) 20,863 (12,011)
Denominator (all weighted averages):        
Denominator for basic EPS (common shares) 87,290 86,760 87,196 84,547
Dilutive effect of share-based compensation awards 195 0 169 0
Denominator for diluted EPS (common shares) 87,485 86,760 87,365 84,547
Basic EPS:        
Income from continuing operations (in dollars per share/unit) $ 0.22 [1] $ 0.06 [1] $ 0.24 [1] $ 0.04 [1]
Discontinued operations (in dollars per share/unit) $ 0.00 [1] $ (0.15) [1] $ 0.00 [1] $ (0.18) [1]
Net income (loss) attributable to COPT common shareholders (in dollars per share/unit) $ 0.22 [1] $ (0.09) [1] $ 0.24 [1] $ (0.14) [1]
Diluted EPS:        
Income from continuing operations (in dollars per share/unit) $ 0.22 [1] $ 0.06 [1] $ 0.24 [1] $ 0.04 [1]
Discontinued operations (in dollars per share/unit) $ 0.00 [1] $ (0.15) [1] $ 0.00 [1] $ (0.18) [1]
Net income (loss) attributable to COPT common shareholders (in dollars per share/unit) $ 0.22 [1] $ (0.09) [1] $ 0.24 [1] $ (0.14) [1]
Corporate Office Properties, L.P.
        
Numerator:        
Income from continuing operations 13,727 10,974 28,635 22,404
Gain on sales of real estate, net 10,630 0 10,630 2,683
Preferred share/unit dividends/distributions (3,718) (4,655) (12,882) (15,976)
Issuance costs associated with redeemed preferred shares 0 0 (1,769) (2,904)
Income from continuing operations attributable to noncontrolling interests (897) (986) (2,476) (2,025)
Income from continuing operations attributable to restricted shares (103) (97) (332) (317)
Numerator for basic and diluted EPS from continuing operations attributable to COPT common shareholders 19,639 5,236 21,806 3,865
Discontinued operations 191 (12,974) 4 (16,215)
Discontinued operations attributable to noncontrolling interests 0 (49) 5 (147)
Numerator for basic and diluted EPS on net income (loss) attributable to COPT common shareholders $ 19,830 $ (7,787) $ 21,815 $ (12,497)
Denominator (all weighted averages):        
Denominator for basic EPS (common shares) 91,166 90,564 91,111 88,379
Dilutive effect of share-based compensation awards 195 0 169 0
Denominator for diluted EPS (common shares) 91,361 90,564 91,280 88,379
Basic EPS:        
Income from continuing operations (in dollars per share/unit) $ 0.22 [2] $ 0.06 [2] $ 0.24 [2] $ 0.04 [2]
Discontinued operations (in dollars per share/unit) $ 0.00 [2] $ (0.15) [2] $ 0.00 [2] $ (0.18) [2]
Net income (loss) attributable to COPT common shareholders (in dollars per share/unit) $ 0.22 [2] $ (0.09) [2] $ 0.24 [2] $ (0.14) [2]
Diluted EPS:        
Income from continuing operations (in dollars per share/unit) $ 0.22 [2] $ 0.06 [2] $ 0.24 [2] $ 0.04 [2]
Discontinued operations (in dollars per share/unit) $ 0.00 [2] $ (0.15) [2] $ 0.00 [2] $ (0.18) [2]
Net income (loss) attributable to COPT common shareholders (in dollars per share/unit) $ 0.22 [2] $ (0.09) [2] $ 0.24 [2] $ (0.14) [2]
[1] Basic and diluted earnings per common share are calculated based on amounts attributable to common shareholders of Corporate Office Properties Trust.
[2] Basic and diluted earnings per common unit are calculated based on amounts attributable to common unitholders of Corporate Office Properties, L.P.