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
Mar. 31, 2014
Mar. 31, 2013
Numerator:    
Income from continuing operations $ 5,660 $ 11,662
Gain on sales of real estate, net 0 2,354
Preferred share/unit dividends/distributions (4,490) (6,106)
(Income) loss from continuing operations attributable to noncontrolling interests (932) (167)
Income from continuing operations attributable to restricted shares (121) (118)
Numerator for basic and diluted EPS from continuing operations attributable to COPT common shareholders 117 7,625
Discontinued operations 11 1,261
Discontinued operations attributable to noncontrolling interests 2 (90)
Numerator for basic and diluted EPS on net income attributable to COPT common shareholders 130 8,796
Denominator (all weighted averages):    
Denominator for basic EPS (common shares) 87,080 81,397
Dilutive effect of share-based compensation awards 112 52
Denominator for diluted EPS (common shares) 87,192 81,449
Basic EPS:    
Income from continuing operations (in dollars per share/unit) $ 0.00 [1] $ 0.09 [1]
Discontinued operations (in dollars per share/unit) $ 0.00 [1] $ 0.02 [1]
Net income attributable to COPT common shareholders (in dollars per share/unit) $ 0.00 [1] $ 0.11 [1]
Diluted EPS:    
Income from continuing operations (in dollars per share/unit) $ 0.00 [1] $ 0.09 [1]
Discontinued operations (in dollars per share/unit) $ 0.00 [1] $ 0.02 [1]
Net income attributable to COPT common shareholders (in dollars per share/unit) $ 0.00 [1] $ 0.11 [1]
Corporate Office Properties, L.P.
   
Numerator:    
Income from continuing operations 5,660 11,662
Gain on sales of real estate, net 0 2,354
Preferred share/unit dividends/distributions (4,655) (6,271)
(Income) loss from continuing operations attributable to noncontrolling interests (739) 369
Income from continuing operations attributable to restricted shares (121) (118)
Numerator for basic and diluted EPS from continuing operations attributable to COPT common shareholders 145 7,996
Discontinued operations 11 1,261
Discontinued operations attributable to noncontrolling interests 2 (33)
Numerator for basic and diluted EPS on net income attributable to COPT common shareholders $ 158 $ 9,224
Denominator (all weighted averages):    
Denominator for basic EPS (common shares) 91,038 85,290
Dilutive effect of share-based compensation awards 112 52
Denominator for diluted EPS (common shares) 91,150 85,342
Basic EPS:    
Income from continuing operations (in dollars per share/unit) $ 0.00 [2] $ 0.09 [2]
Discontinued operations (in dollars per share/unit) $ 0.00 [2] $ 0.02 [2]
Net income attributable to COPT common shareholders (in dollars per share/unit) $ 0.00 [2] $ 0.11 [2]
Diluted EPS:    
Income from continuing operations (in dollars per share/unit) $ 0.00 [2] $ 0.09 [2]
Discontinued operations (in dollars per share/unit) $ 0.00 [2] $ 0.02 [2]
Net income attributable to COPT common shareholders (in dollars per share/unit) $ 0.00 [2] $ 0.11 [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.