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Partners' Capital of the Operating Partnership (Tables) | 12 Months Ended
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Dec. 31, 2019
Equity [Abstract] |
Schedule of Calculation of Numerator and Denominator in Earnings Per Unit | The Operating Partnership's earnings per unit for the years ended December 31, 2019, 2018, and 2017 respectively are computed as follows (in thousands):
| Year Ended December 31,
Numerator | 2019 |  | 2018 |  | 2017
Basic Earnings: |  |  |  |  |
Income attributable to SLGOP common unitholders | $ | 268,785 |  |  | $ | 244,528 |  |  | $ | 90,419 |
Less: distributed earnings allocated to participating securities | (1,739 | ) |  | $ | (552 | ) |  | $ | (471 | )
Net Income attributable to SLGOP common unitholders (numerator for basic earnings per unit) | $ | 267,046 |  |  | $ | 243,976 |  |  | $ | 89,948 |
Add back: Dilutive effect of earnings allocated to participating securities | 1,719 |  |  | 552 |  |  | 471 |
Income attributable to SLGOP common unitholders | $ | 268,765 |  |  | $ | 244,528 |  |  | $ | 90,419 |
| Year Ended December 31,
Denominator | 2019 |  | 2018 |  | 2017
Basic units: |  |  |  |  |
Weighted average common units outstanding | 86,008 |  |  | 91,315 |  |  | 103,127 |
Effect of Dilutive Securities: |  |  |  |  |
Stock-based compensation plans | 554 |  |  | 215 |  |  | 276 |
Diluted weighted average common units outstanding | 86,562 |  |  | 91,530 |  |  | 103,403 |

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