Net Income Per Limited Partner Unit (Details) - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2018 |
Sep. 30, 2018 |
Jun. 30, 2018 |
Mar. 31, 2018 |
Dec. 31, 2017 |
Sep. 30, 2017 |
Jun. 30, 2017 |
Mar. 31, 2017 |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|
| Net income per limited partner unit | |||||||||||
| Net income | $ 585,944 | $ 307,315 | $ 236,703 | ||||||||
| Net income attributable to incentive distribution rights | $ (43,492) | $ (37,816) | $ (33,145) | $ (28,453) | $ (23,772) | $ (19,067) | $ (15,328) | $ (11,553) | (142,906) | (69,720) | (16,944) |
| Limited partners' interest in net income | $ 205,117 | $ 81,948 | $ 76,321 | $ 79,652 | $ 40,383 | $ 61,826 | $ 71,847 | $ 63,539 | $ 443,038 | $ 237,595 | $ 219,759 |
| Net income per limited partner unit - basic | $ 1.10 | $ 0.44 | $ 0.41 | $ 0.43 | $ 2.37 | $ 1.28 | $ 1.24 | ||||
| Net income per limited partner unit - diluted | $ 1.09 | $ 0.44 | $ 0.41 | $ 0.43 | $ 2.36 | $ 1.28 | $ 1.24 | ||||
| Weighted average limited partner units outstanding - basic | 187,048 | 185,630 | 176,647 | ||||||||
| Weighted average units outstanding - diluted | 187,398 | 186,083 | 176,801 | ||||||||
| Weighted average units outstanding: | |||||||||||
| Basic | 187,048 | 185,630 | 176,647 | ||||||||
| Diluted | 187,398 | 186,083 | 176,801 | ||||||||
| Restricted and phantom unit award | |||||||||||
| Net income per limited partner unit | |||||||||||
| Weighted average units outstanding - diluted | 349,339 | ||||||||||
| Weighted average units outstanding: | |||||||||||
| Antidilutive securities excluded from computation of earnings per share | 0 | ||||||||||
| Common units | |||||||||||
| Net income per limited partner unit | |||||||||||
| Weighted average units outstanding - diluted | 187,397,524 | ||||||||||