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 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Numerator:        
Income (loss) from continuing operations $ 9,248 $ (232) $ 14,908 $ 11,430
Gain on sales of real estate, net 0 329 0 2,683
Preferred share/unit dividends/distributions (4,344) (4,885) (8,834) (10,991)
Issuance costs associated with redeemed preferred shares (1,769) (2,904) (1,769) (2,904)
Income from continuing operations attributable to noncontrolling interests (1,171) (1,087) (2,103) (1,254)
Income from continuing operations attributable to restricted shares (108) (102) (229) (220)
Numerator for basic EPS from continuing operations attributable to COPT common shareholders 1,856 (8,881) 1,973 (1,256)
Dilutive effect of common units in COPLP on diluted EPS from continuing operations 0 (478) 0 (108)
Numerator for diluted EPS from continuing operations attributable to COPT common shareholders 1,856 (9,359) 1,973 (1,364)
Discontinued operations (198) (4,502) (187) (3,241)
Discontinued operations attributable to noncontrolling interests 11 127 13 37
Numerator for basic EPS on net (loss) income attributable to COPT common shareholders 1,669 (13,256) 1,799 (4,460)
Dilutive effect of common units in COPLP 0 (671) 0 (242)
Numerator for diluted EPS on net income (loss) attributable to COPT common shareholders 1,669 (13,927) 1,799 (4,702)
Denominator (all weighted averages):        
Denominator for basic EPS (common shares) 87,214 85,425 87,148 83,422
Dilutive effects of common units 0 3,801 0 3,847
Dilutive effect of share-based compensation awards 201 0 156 0
Denominator for diluted EPS (common shares) 87,415 89,226 87,304 87,269
Basic EPS:        
Income (loss) from continuing operations (in dollars per share/unit) $ 0.02 [1] $ (0.10) [1] $ 0.02 [1] $ (0.02) [1]
Discontinued operations (in dollars per share/unit) $ 0.00 [1] $ (0.06) [1] $ 0.00 [1] $ (0.03) [1]
Net income (loss) attributable to COPT common shareholders (in dollars per share/unit) $ 0.02 [1] $ (0.16) [1] $ 0.02 [1] $ (0.05) [1]
Diluted EPS:        
Income (loss) from continuing operations (in dollars per share/unit) $ 0.02 [1] $ (0.10) [1] $ 0.02 [1] $ (0.02) [1]
Discontinued operations (in dollars per share/unit) $ 0.00 [1] $ (0.06) [1] $ 0.00 [1] $ (0.03) [1]
Net income (loss) attributable to COPT common shareholders (in dollars per share/unit) $ 0.02 [1] $ (0.16) [1] $ 0.02 [1] $ (0.05) [1]
Corporate Office Properties, L.P.
        
Numerator:        
Income (loss) from continuing operations 9,248 (232) 14,908 11,430
Gain on sales of real estate, net 0 329 0 2,683
Preferred share/unit dividends/distributions (4,509) (5,050) (9,164) (11,321)
Issuance costs associated with redeemed preferred shares (1,769) (2,904) (1,769) (2,904)
Income from continuing operations attributable to noncontrolling interests (840) (1,408) (1,579) (1,039)
Income from continuing operations attributable to restricted shares (108) (102) (229) (220)
Numerator for diluted EPS from continuing operations attributable to COPT common shareholders 2,022 (9,367) 2,167 (1,371)
Discontinued operations (198) (4,502) (187) (3,241)
Discontinued operations attributable to noncontrolling interests 3 (65) 5 (98)
Numerator for diluted EPS on net income (loss) attributable to COPT common shareholders $ 1,827 $ (13,934) $ 1,985 $ (4,710)
Denominator (all weighted averages):        
Denominator for basic EPS (common shares) 91,126 89,226 91,082 87,269
Dilutive effect of share-based compensation awards 201 0 156 0
Denominator for diluted EPS (common shares) 91,327 89,226 91,238 87,269
Basic EPS:        
Income (loss) from continuing operations (in dollars per share/unit) $ 0.02 [2] $ (0.10) [2] $ 0.02 [2] $ (0.02) [2]
Discontinued operations (in dollars per share/unit) $ 0.00 [2] $ (0.06) [2] $ 0.00 [2] $ (0.03) [2]
Net income (loss) attributable to COPT common shareholders (in dollars per share/unit) $ 0.02 [2] $ (0.16) [2] $ 0.02 [2] $ (0.05) [2]
Diluted EPS:        
Income (loss) from continuing operations (in dollars per share/unit) $ 0.02 [2] $ (0.10) [2] $ 0.02 [2] $ (0.02) [2]
Discontinued operations (in dollars per share/unit) $ 0.00 [2] $ (0.06) [2] $ 0.00 [2] $ (0.03) [2]
Net income (loss) attributable to COPT common shareholders (in dollars per share/unit) $ 0.02 [2] $ (0.16) [2] $ 0.02 [2] $ (0.05) [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.