INVESTMENT IN NUSTAR ENERGY Table 3 (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 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	14.90%	14.90%
NuStar GP Holdings’ share of NuStar Energy’s partners’ equity	$ 257,168	$ 255,715
Step-up in basis related to NuStar Energy’s assets and liabilities, including equity method goodwill, and other	71,461	71,267
Investment in NuStar Energy	328,629	326,982
NuStar Energy [Member]
Reconcilliation of NuStar Energy’s total partners’ equity to our investment in NuStar Energy
NuStar Energy’s partners’ equity	$ 1,725,957	$ 1,716,210