INVESTMENT IN NUSTAR ENERGY Table 1 (Details) - NuStar Energy [Member] - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Equity Method Investment, Summarized Financial Information, Assets [Abstract]
Current assets	$ 377,183	$ 333,851
Property, plant and equipment, net	3,722,283	3,683,571
Goodwill	696,637	696,637
Other non-current assets	234,442	411,466
Total assets	5,030,545	5,125,525
Equity Method Investment, Summarized Financial Information, Liabilities and Equity [Abstract]
Current liabilities	289,396	332,213
Long-term debt	3,014,364	3,055,612
Other non-current liabilities	115,168	127,856
Total liabilities	3,418,928	3,515,681
NuStar Energy partners' equity	1,611,617	1,609,844
Total liabilities and partners’ equity	$ 5,030,545	$ 5,125,525