DISTRIBUTIONS FROM NUSTAR ENERGY Table 2 (Details) - NuStar Energy [Member] - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended				6 Months Ended
	Jul. 28, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Distributions from NuStar Energy (dates and totals)
NuStar Energy's cash distributions per unit applicable to common limited partners (distribution earned)		$ 1.095	$ 1.095	$ 1.095	$ 1.095	$ 2.190	$ 2.190
NuStar Energy's total cash distributions (distribution earned)		$ 115,083	$ 117,168	$ 98,971	$ 98,051	$ 232,251	$ 196,102
NuStar Energy's distribution date of record (distribution earned)		Aug. 07, 2017	May 08, 2017	Feb. 08, 2017
NuStar Energy's distribution payment date (distribution earned)		Aug. 11, 2017	May 12, 2017	Feb. 13, 2017
Subsequent Event [Member]
Distributions from NuStar Energy (dates and totals)
NuStar Energy's distribution announcement date (distribution earned)	Jul. 28, 2017