| Schedule of Net Income (Loss) Per Common Unit |
The following table details the calculation of net income (loss) per common unit: | | | | | | | | | | | | | | | | | | | | | | | | | | Three Months Ended June 30, | | Six Months Ended June 30, | | | 2021 | | 2020 | | 2021 | | 2020 | | | (Thousands of Dollars, Except Unit and Per Unit Data) | | Net income (loss) | $ | 63,383 | | | $ | 29,766 | | | $ | 105,640 | | | $ | (117,875) | | Distributions to preferred limited partners | (31,887) | | | (30,684) | | | (63,774) | | | (61,107) | | | Distributions to common limited partners | (43,814) | | | (43,678) | | | (87,648) | | | (87,408) | | | Distribution equivalent rights to restricted units | (586) | | | (502) | | | (1,184) | | | (1,008) | | | Distributions in excess of income (loss) | $ | (12,904) | | | $ | (45,098) | | | $ | (46,966) | | | $ | (267,398) | | | | | | | | | | | Distributions to common limited partners | $ | 43,814 | | | $ | 43,678 | | | $ | 87,648 | | | $ | 87,408 | | | Allocation of distributions in excess of income (loss) | (12,904) | | | (45,098) | | | (46,966) | | | (267,398) | | | Series D Preferred Unit accretion | (4,155) | | | (5,064) | | | (8,176) | | | (9,966) | | | Net income (loss) attributable to common units | $ | 26,755 | | | $ | (6,484) | | | $ | 32,506 | | | $ | (189,956) | | | | | | | | | | | Basic and diluted weighted-average common units outstanding | 109,529,658 | | | 109,194,722 | | | 109,518,004 | | | 109,046,061 | | | | | | | | | | | Basic and diluted net income (loss) per common unit | $ | 0.25 | | | $ | (0.06) | | | $ | 0.30 | | | $ | (1.74) | |
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