CONSOLIDATED STATEMENTS OF OPERATIONS - (Allocation of Net Income) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Limited partner interest:
Continuing operations	$ 23,143	$ 21,208	$ (8,255)
Discontinued operations	0	694	(6,921)
Limited partner's interest in net income (loss)	23,143	21,902	(15,176)
General partner interest:
Continuing operations	8,419	15,821	1,906
Discontinued operations	0	517	1,597
Net Income Allocated to General Partners	$ 8,419	$ 16,338	$ 3,503
Basic:
Continuing operations (in dollars per share)	$ 0.65	$ 0.60	$ (0.27)
Discontinued operations (in dollars per share)	0	0.02	(0.22)
Net Income, Basic (in dollars per share)	$ 0.65	$ 0.62	$ (0.49)
Weighted average limited partner units outstanding basic (in shares)	35,347,032	35,308,649	30,785,035
Diluted:
Continuing operations (in dollars per share)	$ 0.65	$ 0.60	$ (0.27)
Discontinued operations (in dollars per share)	0	0.02	(0.22)
Net Income, Diluted (in dollars per shares)	$ 0.65	$ 0.62	$ (0.49)
Weighted average limited partner units - diluted (in shares)	35,375,000	35,372,000	30,785,000