| In millions, except per share items | Dec-31-22 | Dec-31-21 | Dec-31-20 | Dec-31-19 | Dec-31-18 | Dec-31-17 | Dec-31-16 | Dec-31-15 |
| | 10-K | 10-K | 10-K | 10-K/A | 10-K | 10-K | 10-K | 10-K |
| Net revenues | | | | | | | | |
| Revenues | 1,036.4 | 700.9 | 563.4 | 584.0 | 657.6 | 538.1 | 448.1 | 589.7 |
| Revenues growth | 47.9% | 24.4% | -3.5% | -11.2% | 22.2% | 20.1% | -24.0% | -29.9% |
| Cost of sales: | | | | | | | | |
| Cost of materials and other | | | | | | | | |
| Operating expenses (excluding depreciation and amortization presented below) | 85.4 | 59.5 | 53.8 | 71.3 | 55.9 | 40.2 | 34.9 | |
| Depreciation and amortization | 60.2 | 40.9 | 33.7 | 24.9 | 24.1 | 19.0 | 17.9 | |
| Total cost of sales | 787.0 | 484.8 | 356.7 | 432.7 | 509.1 | 432.1 | 320.1 | |
| Operating expenses related to wholesale business | 2.9 | 2.3 | 2.4 | | | | | |
| General and administrative expenses | 34.2 | 21.5 | 22.6 | 20.8 | 17.2 | 11.8 | 10.3 | 11.4 |
| Depreciation and amortization | 2.8 | 1.8 | 2.0 | 1.8 | 1.9 | 2.9 | 2.9 | 19.7 |
| (Gain) loss on disposal of assets | -0.1 | -0.1 | -0.1 | 0.0 | 0.9 | 0.0 | | |
| Total operating costs and expenses | 1,699.2 | 1,054.7 | 794.1 | 962.2 | 1,096.9 | 922.1 | 760.3 | 512.4 |
| Operating income | 209.7 | 190.5 | 179.8 | 125.8 | 125.8 | 88.2 | 77.7 | 77.3 |
| Operating margin | 20.2% | 27.2% | 31.9% | 21.5% | 19.1% | 16.4% | 17.3% | 13.1% |
| Interest expense, net | -82.3 | -50.2 | -42.9 | -47.3 | -41.3 | -23.9 | -13.6 | -10.7 |
| Income from equity method investments | -31.7 | -24.6 | -22.7 | -19.8 | -6.2 | -5.0 | 1.2 | 0.6 |
| Other income, net | -2.1 | -0.1 | 0.1 | 0.6 | 0.0 | 0.0 | | |
| Total non-operating expenses, net | 50.2 | 25.5 | 20.3 | 28.1 | 35.0 | 19.0 | 14.8 | 11.2 |
| Income before income tax expense | 159.4 | 165.0 | 159.5 | 97.7 | 90.7 | 69.2 | 62.9 | 66.0 |
| Income tax expense | 0.4 | 0.2 | 0.2 | 1.0 | 0.5 | -0.2 | 0.1 | -0.2 |
| Net income attributable to partners | 159.1 | 164.8 | 159.3 | 96.7 | 90.2 | 69.4 | 62.8 | 66.8 |
| Comprehensive income attributable to partners | 159.1 | 164.8 | 159.3 | 96.7 | 90.2 | 69.4 | 62.8 | 66.8 |
| |
| Net income per limited partner unit: | | | | | | | | |
| Basic (in dollars per unit) | $3.66 | $3.79 | $4.18 | $2.61 | $2.65 | $2.09 | $2.08 | $2.55 |
| Diluted (in dollars per unit) | $3.66 | $3.79 | $4.18 | $2.61 | $2.65 | $2.09 | $2.08 | $2.55 |
| |
| Weighted average limited partner units outstanding: | | | | | | | | |
| Basic (in units) | 43.5 | 43.4 | 33.6 | 24.4 | 24.4 | 24.3 | 22.5 | 12.2 |
| Diluted (in units) | 43.5 | 43.5 | 33.6 | 24.4 | 24.4 | 24.4 | 22.6 | 12.4 |
| Cash distributions per limited partner unit (in dollars per unit) | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |