CONSOLIDATED AND CONDENSED STATEMENTS OF OPERATIONS - Allocation of Net Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Limited partner interest:
Continuing operations	$ (9,486)	$ (16,649)	$ (6,544)	$ (4,034)
Discontinued operations	48,116	726	50,633	2,354
Limited partners’ interest in net income (loss)	38,630	(15,923)	44,089	(1,680)
General partner interest:
Continuing operations	(193)	(340)	(134)	(82)
Discontinued operations	982	15	1,034	48
General partner interest in net income (loss)	$ 789	$ (325)	$ 900	$ (34)
Basic:
Continuing operations (in dollars per share)	$ (0.24)	$ (0.44)	$ (0.17)	$ (0.10)
Discontinued operations (in dollars per share)	1.24	0.02	1.30	0.06
Net income (loss) per unit attributable to limited partners, Basic (in dollars per share)	$ 1.00	$ (0.42)	$ 1.13	$ (0.04)
Weighted average limited partner units - basic (in shares)	38,711,515	38,357,171	38,876,783	38,015,704
Diluted:
Continuing operations (in dollars per share)	$ (0.24)	$ (0.44)	$ (0.17)	$ (0.10)
Discontinued operations (in dollars per share)	1.24	0.02	1.30	0.06
Net income (loss) per unit attributable to limited partners, Diluted (in dollars per share)	$ 1.00	$ (0.42)	$ 1.13	$ (0.04)
Weighted average limited partner units - diluted (in shares)	38,738,101	38,357,171	38,889,081	38,015,704