INVESTMENT IN NUSTAR ENERGY Table 1 (Details) - NuStar Energy [Member] - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Equity Method Investment, Summarized Financial Information, Assets [Abstract]
Current assets	$ 230,862	$ 377,183
Property, plant and equipment, net	4,147,333	3,722,283
Goodwill	1,023,359	696,637
Intangible assets, net	857,616	127,083
Other non-current assets	100,154	107,359
Total assets	6,359,324	5,030,545
Equity Method Investment, Summarized Financial Information, Liabilities and Equity [Abstract]
Current liabilities	654,517	289,396
Long-term debt	3,073,864	3,014,364
Other non-current liabilities	129,894	115,168
Total liabilities	3,858,275	3,418,928
NuStar Energy partners' equity	2,501,049	1,611,617
Total liabilities and partners’ equity	$ 6,359,324	$ 5,030,545