NET INCOME PER COMMON UNIT Table - Net Income per Common Unit (Details) - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2018 |
Jun. 30, 2017 |
Jun. 30, 2018 |
Jun. 30, 2017 |
|
| Earnings Per Share [Abstract] | ||||
| Net income | $ 29,399 | $ 26,250 | $ 155,532 | $ 84,190 |
| Less: Distributions to preferred limited partners | 16,245 | 9,950 | 32,235 | 14,763 |
| Less: Distributions to general partner (including incentive distribution rights) | 0 | 13,214 | 1,141 | 28,469 |
| Less: Distributions to common limited partners | 64,205 | 101,869 | 120,121 | 203,782 |
| Less: Distribution equivalents rights to restricted units | 480 | 712 | 925 | 1,427 |
| Distributions (in excess of) less than earnings | (51,531) | (99,495) | 1,110 | (164,251) |
| Net income attributable to common units: | ||||
| Common limited partners’ distribution | 64,205 | 101,869 | 120,121 | 203,782 |
| Allocation of distributions (in excess of) less than earnings | (50,500) | (97,505) | 1,079 | (160,966) |
| Total | $ 13,705 | $ 4,364 | $ 121,200 | $ 42,816 |
| Basic weighted-average common units outstanding | 93,192,238 | 90,345,469 | 93,187,038 | 84,526,506 |
| Basic net income per common unit | $ 0.15 | $ 0.05 | $ 1.30 | $ 0.51 |