INVESTMENT IN NUSTAR ENERGY Table 1 (Details) - NuStar Energy [Member] - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Equity Method Investment, Summarized Financial Information, Assets [Abstract]
Current assets	$ 333,573	$ 333,851
Property, plant and equipment, net	3,686,687	3,683,571
Goodwill	696,637	696,637
Other non-current assets	378,652	411,466
Total assets	5,095,549	5,125,525
Equity Method Investment, Summarized Financial Information, Liabilities and Equity [Abstract]
Current liabilities	272,790	332,213
Long-term debt	3,125,650	3,055,612
Other non-current liabilities	139,457	127,856
Total liabilities	3,537,897	3,515,681
NuStar Energy partners' equity	1,557,652	1,609,844
Total liabilities and partners’ equity	$ 5,095,549	$ 5,125,525