| | | | | | | | | | | | | | | | | Three Months Ended March 31, 2016 (in millions, except per unit data) | Limited Partners' Common Units | | Limited Partners' Subordinated Units | | Incentive Distribution Rights | | Total | Net income attributable to partners | | | | | | | | Distribution | $ | 10.1 |
| | $ | 8.8 |
| | $ | — |
| | $ | 18.9 |
| Net income in excess of distribution | 3.3 |
| | 2.8 |
| | 2.3 |
| | 8.4 |
| Net income attributable to partners | $ | 13.4 |
| | $ | 11.6 |
| | $ | 2.3 |
| | $ | 27.3 |
| | | | | | | | | Weighted average limited partner units outstanding | | | | | | | | Basic and diluted | 53.8 |
| | 46.8 |
| | | | 100.6 |
| Net income attributable to partners' ownership interest per limited partner unit | | | | | | | | Basic and diluted | $ | 0.25 |
| | $ | 0.25 |
| | | | $ | 0.25 |
|
| | | | | | | | | | | | | | | | | Three Months Ended March 31, 2015 (in millions, except per unit data) | Limited Partners' Common Units | | Limited Partners' Subordinated Units | | Incentive Distribution Rights | | Total | Net income attributable to partners | | | | | | | | Distribution | $ | — |
| | $ | — |
| | $ | — |
| | $ | — |
| Net income in excess of distribution(1) | 7.1 |
| | 6.2 |
| | — |
| | 13.3 |
| Net income attributable to partners | $ | 7.1 |
| | $ | 6.2 |
| | $ | — |
| | $ | 13.3 |
| | | | | | | | | Weighted average limited partner units outstanding | | | | | | | | Basic and diluted | 53.8 |
| | 46.8 |
| | | | 100.6 |
| Net income attributable to partners' ownership interest subsequent to IPO per limited partner unit | | | | | | | | Basic and diluted | $ | 0.13 |
| | $ | 0.13 |
| | | | $ | 0.13 |
|
(1) Net income attributable to limited partners and in excess of distribution is for the period subsequent to the IPO. |