CONSOLIDATED BALANCE SHEETS Non-Printing - USD ($) $ in Thousands |
Mar. 31, 2018 |
Dec. 31, 2017 |
|---|---|---|
| Allowance for doubtful accounts | $ 10,344 | $ 9,948 |
| Limited partners common units outstanding (in units) | 93,182,045 | 93,176,683 |
| Series A Preferred Limited Partner [Member] | ||
| Preferred units outstanding | 9,060,000 | 9,060,000 |
| Series B Preferred Limited Partner [Member] | ||
| Preferred units outstanding | 15,400,000 | 15,400,000 |
| Series C Preferred Limited Partner [Member] | ||
| Preferred units outstanding | 6,900,000 | 6,900,000 |