CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
Equity in earnings (loss) of NuStar Energy L.P.	$ 16,739	$ 13,417	$ 31,129	$ 25,561
General and administrative expenses	(880)	(618)	(1,752)	(1,418)
Other income (expense), net	196	18	213	99
Interest expense, net	(231)	(170)	(453)	(343)
Income (loss) before income tax (expense) benefit	15,824	12,647	29,137	23,899
Income tax (expense) benefit	(56)	(88)	277	(265)
Net income (loss)	15,768	12,559	29,414	23,634
Comprehensive income (loss)	$ 15,786	$ 12,648	$ 28,484	$ 23,920
Basic net income (loss) per unit	$ 0.37	$ 0.29	$ 0.69	$ 0.55
Diluted net income (loss) per unit	$ 0.37	$ 0.29	$ 0.69	$ 0.55
Weighted-average number of basic units outstanding	42,658,178	42,618,376	42,657,235	42,612,057
Weighted-average number of diluted units outstanding	42,687,795	42,618,376	42,672,125	42,612,057