INVESTMENT IN NUSTAR ENERGY Table 1 (Details) - NuStar Energy [Member] - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Equity Method Investment, Summarized Financial Information, Assets [Abstract]
Current assets	$ 338,357	$ 389,147
Property, plant and equipment, net	3,656,273	3,460,732
Goodwill	704,404	617,429
Other non-current assets	436,097	451,488
Total assets	5,135,131	4,918,796
Equity Method Investment, Summarized Financial Information, Liabilities and Equity [Abstract]
Current liabilities	255,373	365,192
Long-term debt	3,109,359	2,749,452
Other non-current liabilities	116,499	87,942
Total liabilities	3,481,231	3,202,586
NuStar Energy partners' equity	1,653,900	1,716,210
Total liabilities and partners’ equity	$ 5,135,131	$ 4,918,796