INVESTMENT IN NUSTAR ENERGY Table 3 (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Reconcilliation of NuStar Energy’s total partners’ equity to our investment in NuStar Energy
NuStar GP Holdings’ ownership interest in NuStar Energy	15.00%
NuStar GP Holdings’ share of NuStar Energy’s partners’ equity	$ 248,085	$ 255,715
Step-up in basis related to NuStar Energy’s assets and liabilities, including equity method goodwill, and other	71,940	71,267
Investment in NuStar Energy	320,025	326,982
NuStar Energy [Member]
Reconcilliation of NuStar Energy’s total partners’ equity to our investment in NuStar Energy
NuStar Energy’s partners’ equity	$ 1,653,900	$ 1,716,210
NuStar GP Holdings’ ownership interest in NuStar Energy	15.00%	14.90%