Consolidated Statements of Changes in Partners' Capital (Deficit) - USD ($) $ in Thousands	Total		Limited Partner [Member]	Preferred Partner [Member]	General Partner [Member]
Balance at Dec. 31, 2017	$ 4,684		$ 454,358	$ 253,923	$ (703,597)
Net income (loss)	(42,047)	[1]	(66,818)	25,115	(344)
Equity-based incentive compensation	1,845		1,811		34
Distributions	(44,736)		(18,587)	(25,115)	(1,034)
Capital contributions	183				183
Capital contributions related to sale of terminal assets to Ergon	72,967				72,967
Proceeds from sale of common units pursuant to the Employee Unit Purchase Plan	208		208
Balance at Dec. 31, 2018	(6,896)		370,972	253,923	(631,791)
Net income (loss)	18,412		(6,990)	25,115	287
Equity-based incentive compensation	973		953		20
Distributions	(33,988)		(8,334)	(25,115)	(539)
Proceeds from sale of common units pursuant to the Employee Unit Purchase Plan	176		176
Balance at Dec. 31, 2019	$ (21,323)		$ 356,777	$ 253,923	$ (632,023)

[1] Operating loss and net loss for the fourth quarter and full year 2018 are impacted by asset impairment charges of $52.4 million and $53.1 million, respectively.