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Earnings Per Share ("EPS") and Earnings Per Unit ("EPU") (Details 2) - shares | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015
Conversion of common units |  |  |  |
Antidilutive securities |  |  |  |
Antidilutive securities excluded from computation of diluted earnings per share (in shares) | 3,591,000 | 3,679,000 | 3,648,000 | 0
Conversion of Series I Preferred Units |  |  |  |
Antidilutive securities |  |  |  |
Antidilutive securities excluded from computation of diluted earnings per share (in shares) | 176,000 | 176,000 | 176,000 | 176,000
Conversion of Series K Preferred Shares |  |  |  |
Antidilutive securities |  |  |  |
Antidilutive securities excluded from computation of diluted earnings per share (in shares) | 434,000 | 0 | 434,000 | 434,000
Weighted average restricted stock and deferred shares |  |  |  |
Antidilutive securities |  |  |  |
Antidilutive securities excluded from computation of diluted earnings per share (in shares) | 375,000 | 411,000 | 394,000 | 412,000
Weighted average options |  |  |  |
Antidilutive securities |  |  |  |
Antidilutive securities excluded from computation of diluted earnings per share (in shares) | 233,000 | 440,000 | 307,000 | 480,000
Corporate Office Properties, L.P. | Weighted average restricted stock and deferred shares |  |  |  |
Antidilutive securities |  |  |  |
Antidilutive securities excluded from computation of diluted earnings per share (in shares) | 375,000 | 411,000 | 394,000 | 412,000
Corporate Office Properties, L.P. | Weighted average options |  |  |  |
Antidilutive securities |  |  |  |
Antidilutive securities excluded from computation of diluted earnings per share (in shares) | 233,000 | 440,000 | 307,000 | 480,000
Corporate Office Properties, L.P. | Conversion of Series I preferred units |  |  |  |
Antidilutive securities |  |  |  |
Antidilutive securities excluded from computation of diluted earnings per share (in shares) | 176,000 | 176,000 | 176,000 | 176,000
Corporate Office Properties, L.P. | Conversion of Series K preferred units |  |  |  |
Antidilutive securities |  |  |  |
Antidilutive securities excluded from computation of diluted earnings per share (in shares) | 434,000 | 0 | 434,000 | 434,000

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