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Partners' Capital of the Operating Partnership (Tables) | 6 Months Ended
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Jun. 30, 2018
Equity [Abstract] |
Schedule of calculation of numerator and denominator in earnings per unit | The Operating Partnership's earnings per unit for the three and six months ended June 30, 2018 and 2017, respectively, are computed as follows (in thousands):
| Three Months Ended June 30, |  | Six Months Ended June 30,
Numerator | 2018 |  | 2017 |  | 2018 |  | 2017
Basic and Diluted Earnings: |  |  |  |  |  |  |
Income attributable to SLGOP common unitholders | $ | 109,142 |  |  | $ | 8,641 |  |  | $ | 216,180 |  |  | $ | 20,468 |
| Three Months Ended June 30, |  | Six Months Ended June 30,
Denominator | 2018 |  | 2017 |  | 2018 |  | 2017
Basic units: |  |  |  |  |  |  |
Weighted average common units outstanding | 91,882 |  |  | 104,462 |  |  | 93,467 |  |  | 104,852 |
Effect of Dilutive Securities: |  |  |  |  |  |  |
Stock-based compensation plans | 201 |  |  | 270 |  |  | 200 |  |  | 288 |
Diluted weighted average common units outstanding | 92,083 |  |  | 104,732 |  |  | 93,667 |  |  | 105,140 |

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- Definition Schedule of Calculation of Numerator and Denominator in Earnings Per Unit [Table Text Block] + References No definition available. + Details
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- References No definition available. + Details
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