Quarterly report pursuant to Section 13 or 15(d)

Earnings Per Share ("EPS") (Details)

v2.4.0.6
Earnings Per Share ("EPS") (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Numerator:    
Income (loss) from continuing operations $ 2,592 $ (20,366)
Gain on sales of real estate, net   2,701
Preferred share dividends (4,025) (4,025)
(Income) loss from continuing operations attributable to noncontrolling interests (53) 719
Income from continuing operations attributable to restricted shares (141) (282)
Numerator for basic EPS from continuing operations attributable to COPT common shareholders (1,627) (21,253)
Dilutive effect of common units in the Operating Partnership on diluted EPS from continuing operations   (1,422)
Numerator for diluted EPS from continuing operations attributable to COPT common shareholders (1,627) (22,675)
Numerator for basic EPS from continuing operations attributable to COPT common shareholders (1,627) (21,253)
Discontinued operations 4,385 (901)
Discontinued operations attributable to noncontrolling interests (247) 57
Numerator for basic EPS on net (loss) income attributable to COPT common shareholders 2,511 (22,097)
Dilutive effect of common units in the Operating Partnership   (1,479)
Numerator for diluted EPS on net income (loss) attributable to COPT common shareholders $ 2,511 $ (23,576)
Denominator (all weighted averages):    
Denominator for basic EPS (common shares) (in shares) 71,458 66,340
Dilutive effect of common units (in shares)   4,396
Denominator for diluted EPS (in shares) 71,458 70,736
Basic EPS:    
Loss from continuing operations attributable to COPT common shareholders (in dollars per share) $ (0.02) [1] $ (0.32) [1]
Discontinued operations attributable to COPT common shareholders (in dollars per share) $ 0.06 [1] $ (0.01) [1]
Net income (loss) attributable to COPT common shareholders (in dollars per share) $ 0.04 [1] $ (0.33) [1]
Diluted EPS:    
Loss from continuing operations attributable to COPT common shareholders $ (0.02) [1] $ (0.32) [1]
Discontinued operations attributable to COPT common shareholders (in dollars per share) $ 0.06 [1] $ (0.01) [1]
Net income (loss) attributable to COPT common shareholders (in dollars per share) $ 0.04 [1] $ (0.33) [1]
[1] Basic and diluted earnings per common share are calculated based on amounts attributable to common shareholders of Corporate Office Properties Trust.