CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN PARTNERS' CAPITAL - 6 months ended Jun. 30, 2018	USD ($) shares
Partners' capital, beginning balance at Dec. 31, 2017	$ 262,065,434
Partners' capital, beginning balance (in units) at Dec. 31, 2017 | shares	16,509,799
Increase (Decrease) in Partners' Capital
Distributions to unitholders	$ (13,131,816)
Restricted units granted, net of forfeitures | shares	329,663
Unit-based compensation	$ 1,391,973
Net income (loss)	(51,446,176)
Partners' capital, ending balance at Jun. 30, 2018	$ 198,879,415
Partners' capital, ending balance (in units) at Jun. 30, 2018 | shares	16,839,462