| Schedule of Net Income Per Common Unit |
The following table details the calculation of net income per common unit: | | | | | | | | | | | | | | | | | | Three Months Ended June 30, | | Six Months Ended June 30, | | 2018 | | 2017 | | 2018 | | 2017 | | (Thousands of Dollars, Except Unit and Per Unit Data) | Net income | $ | 29,399 |
| | $ | 26,250 |
| | $ | 155,532 |
| | $ | 84,190 |
| Less: Distributions to preferred limited partners | 16,245 |
| | 9,950 |
| | 32,235 |
| | 14,763 |
| Less: Distributions to general partner (including incentive distribution rights) | — |
| | 13,214 |
| | 1,141 |
| | 28,469 |
| Less: Distributions to common limited partners | 64,205 |
| | 101,869 |
| | 120,121 |
| | 203,782 |
| Less: Distribution equivalent rights to restricted units | 480 |
| | 712 |
| | 925 |
| | 1,427 |
| Distributions (in excess of) less than earnings | $ | (51,531 | ) | | $ | (99,495 | ) |
| $ | 1,110 |
|
| $ | (164,251 | ) | | | | | | | | | Net income attributable to common units: | | | | | | | | Distributions to common limited partners | $ | 64,205 |
| | $ | 101,869 |
| | $ | 120,121 |
| | $ | 203,782 |
| Allocation of distributions (in excess of) less than earnings | (50,500 | ) | | (97,505 | ) | | 1,079 |
| | (160,966 | ) | Total | $ | 13,705 |
| | $ | 4,364 |
| | $ | 121,200 |
| | $ | 42,816 |
| | | | | | | | | Basic weighted-average common units outstanding | 93,192,238 |
| | 90,345,469 |
| | 93,187,038 |
| | 84,526,506 |
| | | | | | | | | Basic net income per common unit | $ | 0.15 |
| | $ | 0.05 |
| | $ | 1.30 |
| | $ | 0.51 |
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