Casper Terminal Acquisition - Pro Forma Information (Details) - Casper Crude to Rail, LLC - USD ($) $ / shares in Units, $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Business Acquisition [Line Items] | ||
| Total revenues | $ 112,325 | $ 44,536 |
| Operating income | 30,997 | 1,682 |
| Net income (loss) | $ 21,310 | $ (12,043) |
| Earnings (loss) per common unit (basic) (in dollars per share) | $ 0.93 | $ (0.52) |
| Earnings (loss) per common unit (diluted) (in dollars per share) | $ 0.93 | $ (0.52) |