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Stockholders' Equity of the Company (Tables) | 9 Months Ended
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Sep. 30, 2018
Stockholders' Equity Note [Abstract] |
Class of Treasury Stock | At September 30, 2018, repurchases executed under the plan were as follows:
Period | Shares repurchased | Average price paid per share | Cumulative number of shares repurchased as part of the repurchase plan or programs | Maximum approximate dollar value of shares that may yet be repurchased under the plan (in millions) (1)
Year ended 2017 | 8,342,411 | $101.64 | 8,342,411 | $1,152.0
First quarter 2018 | 3,653,928 | $97.07 | 11,996,339 | $797.2
Second quarter 2018 | 3,479,552 | $97.22 | 15,475,891 | $458.9
Third quarter 2018 | 252,947 | $99.75 | 15,728,838 | $433.6
(1) | Reflective of $2.0 billion plan maximum as of September 30, 2018.
Schedule of Common Stock Issued and Proceeds Received Dividend Reinvestments | The following table summarizes SL Green common stock issued, and proceeds received from dividend reinvestments and/or stock purchases under the DRSPP for the nine months ended September 30, 2018 and 2017, respectively (dollars in thousands):
| Nine Months Ended September 30,
| 2018 |  | 2017
Shares of common stock issued | 1,183 |  |  | 1,771 |
Dividend reinvestments/stock purchases under the DRSPP | $ | 64 |  |  | $ | 185 |
Schedule of Earnings Per Share | SL Green's earnings per share for the three and nine months ended September 30, 2018 and 2017 are computed as follows (in thousands):
| Three Months Ended September 30, |  | Nine Months Ended September 30,
Numerator | 2018 |  | 2017 |  | 2018 |  | 2017
Basic Earnings: |  |  |  |  |  |  |
Income attributable to SL Green common stockholders | $ | 88,209 |  |  | $ | 38,869 |  |  | $ | 293,531 |  |  | $ | 58,442 |
Less: distributed earnings allocated to participating securities | (125 | ) |  | (109 | ) |  | (371 | ) |  | (330 | )
Less: undistributed earnings allocated to participating securities | (33 | ) |  | — |  |  | (138 | ) |  | — |
Net income attributable to SL Green common stockholders (numerator for basic earnings per share) | $ | 88,051 |  |  | $ | 38,760 |  |  | $ | 293,022 |  |  | $ | 58,112 |
Add back: undistributed earnings allocated to participating securities | 33 |  |  | — |  |  | 138 |  |  | — |
Add back: distributed earnings allocated to participating securities | 125 |  |  | 109 |  |  | 371 |  |  | 330 |
Add back: Effect of dilutive securities (redemption of units to common shares) | 4,797 |  |  | 1,812 |  |  | 15,656 |  |  | 2,707 |
Income attributable to SL Green common stockholders (numerator for diluted earnings per share) | $ | 93,006 |  |  | $ | 40,681 |  |  | $ | 309,187 |  |  | $ | 61,149 |
| Three Months Ended September 30, |  | Nine Months Ended September 30,
Denominator | 2018 |  | 2017 |  | 2018 |  | 2017
Basic Shares: |  |  |  |  |  |  |
Weighted average common stock outstanding | 85,566 |  |  | 97,783 |  |  | 87,692 |  |  | 99,431 |
Effect of Dilutive Securities: |  |  |  |  |  |  |
Operating Partnership units redeemable for common shares | 4,643 |  |  | 4,543 |  |  | 4,677 |  |  | 4,570 |
Stock-based compensation plans | 219 |  |  | 244 |  |  | 211 |  |  | 279 |
Diluted weighted average common stock outstanding | 90,428 |  |  | 102,570 |  |  | 92,580 |  |  | 104,280 |

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