| Schedule of Net Income (Loss) Per Common Unit |
The following table details the calculation of net income (loss) per common unit: | | | | | | | | | | | | | | | | | | | | | | | | | | Three Months Ended September 30, | | Nine Months Ended September 30, | | | 2020 | | 2019 | | 2020 | | 2019 | | | (Thousands of Dollars, Except Unit and Per Unit Data) | | Net (loss) income | $ | (96,640) | | | $ | 47,811 | | | $ | (214,515) | | | $ | (184,101) | | Distributions to preferred limited partners | (31,888) | | | (30,423) | | | (92,995) | | | (91,269) | | | Distributions to common limited partners | (43,678) | | | (64,660) | | | (131,086) | | | (194,008) | | | Distribution equivalent rights to restricted units | (502) | | | (607) | | | (1,510) | | | (1,892) | | | Distributions in excess of loss | $ | (172,708) | | | $ | (47,879) | | | $ | (440,106) | | | $ | (471,270) | | | | | | | | | | | Distributions to common limited partners | $ | 43,678 | | | $ | 64,660 | | | $ | 131,086 | | | $ | 194,008 | | | Allocation of distributions in excess of loss | (172,708) | | | (47,879) | | | (440,106) | | | (471,270) | | | Series D Preferred Unit accretion | (3,767) | | | (4,592) | | | (13,733) | | | (13,340) | | | Net (loss) income attributable to common units | $ | (132,797) | | | $ | 12,189 | | | $ | (322,753) | | | $ | (290,602) | | | | | | | | | | | Basic weighted-average common units outstanding | 109,195,358 | | | 107,763,870 | | | 109,096,190 | | | 107,687,019 | | | | | | | | | | | Diluted common units outstanding: | | | | | | | | | Basic weighted-average common units outstanding | 109,195,358 | | | 107,763,870 | | | 109,096,190 | | | 107,687,019 | | | Effect of dilutive potential common units | — | | | 111,659 | | | — | | | 37,629 | | | Diluted weighted-average common units outstanding | 109,195,358 | | | 107,875,529 | | | 109,096,190 | | | 107,724,648 | | | | | | | | | | | Basic and diluted net (loss) income per common unit | $ | (1.22) | | | $ | 0.11 | | | $ | (2.96) | | | $ | (2.70) | |
|