SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Narrative (Details) - USD ($) |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
|
| Goodwill impairment loss | $ 0 | $ 0 | |
| Unrecognized tax benefits | $ 0 | 0 | |
| Tax years subject to examination | For U.S. federal and state purposes, as well as for our major non-U.S. jurisdictions, tax years subject to examination are 2013 through 2016, according to standard statute of limitations. | ||
| Asset retirement obligation | $ 700,000 | $ 600,000 | |
| General partner ownership interest | 2.00% | 2.00% | 2.00% |
| Common Limited Partner [Member] | |||
| Common unitholders ownership interest | 98.00% | ||
| General Partner [Member] | |||
| General partner ownership interest | 2.00% | ||