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Partners' Capital of the Operating Partnership - EPS (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Numerator |  |  |  |
Less: distributed earnings allocated to participating securities | $ (333) | $ (108) | $ (777) | $ (325)
Less: undistributed earnings allocated to participating securities | 0 | 0 | (141) | (41)
Net Income attributable to common unitholders (numerator for basic earnings per unit) | 13,526 | 33,049 | 184,186 | 237,686
Add back: dilutive effect of earnings allocated to participating securities | (333) | (108) | (777) | (325)
Add back: undistributed earnings allocated to participating securities | 0 | 0 | (141) | (41)
Income attributable to SL Green common stockholders | $ 14,661 | 34,876 | $ 195,177 | 250,358
Denominator |  |  |  |
Common stock shares excluded from the diluted shares outstanding (shares) | 2,131,606 |  | 1,779,212 |
SL Green Operating Partnership |  |  |  |
Numerator |  |  |  |
Net income attributable to SLGOP common unitholders | $ 14,661 | 34,876 | $ 195,177 | 250,358
Less: distributed earnings allocated to participating securities | (333) | (108) | (777) | (325)
Less: undistributed earnings allocated to participating securities | 0 | 0 | (141) | (41)
Net Income attributable to common unitholders (numerator for basic earnings per unit) | 14,328 | 34,768 | 194,259 | 249,992
Add back: dilutive effect of earnings allocated to participating securities | 333 | 108 | 777 | 325
Add back: undistributed earnings allocated to participating securities | 0 | 0 | 141 | 41
Income attributable to SL Green common stockholders | $ 14,661 | $ 34,876 | $ 195,177 | $ 250,358
Denominator |  |  |  |
Basic weighted average common units outstanding (in shares) | 77,049,000 | 86,550,000 | 79,644,000 | 87,138,000
Stock-based compensation plans (shares) | 442,000 | 164,000 | 441,000 | 171,000
Diluted weighted average common units outstanding (shares) | 77,491,000 | 86,714,000 | 80,085,000 | 87,309,000
Common stock shares excluded from the diluted shares outstanding (shares) | 2,131,606 | 1,317,803 | 1,779,212 | 1,266,296

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