CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Equity in earnings of NuStar Energy L.P.	$ 10,963	$ 16,280	$ 29,075	$ 33,295
General and administrative expenses:
Third parties	(613)	(591)	(1,200)	(1,340)
Related party	(242)	(250)	(483)	(333)
Total general and administrative expenses	(855)	(841)	(1,683)	(1,673)
Other income, net	41,603	0	41,603	613
Interest expense, net	(394)	(267)	(686)	(513)
Income before income tax (expense) benefit	51,317	15,172	68,309	31,722
Income tax (expense) benefit	(6)	(99)	(6)	27
Net income	$ 51,311	$ 15,073	$ 68,303	$ 31,749
Net income per unit	$ 1.19	$ 0.35	$ 1.58	$ 0.74
Weighted-average number of common units outstanding	42,951,749	42,931,059	42,951,749	42,930,804
Comprehensive income	$ 53,233	$ 11,607	$ 70,785	$ 21,565