INVESTMENT IN NUSTAR ENERGY Table 1 (Details) - NuStar Energy [Member] - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Equity Method Investment, Summarized Financial Information, Assets [Abstract]
Current assets	$ 253,666	$ 377,183
Property, plant and equipment, net	3,723,268	3,722,283
Goodwill	696,637	696,637
Other non-current assets	221,845	234,442
Total assets	4,895,416	5,030,545
Equity Method Investment, Summarized Financial Information, Liabilities and Equity [Abstract]
Current liabilities	254,492	289,396
Long-term debt	2,951,980	3,014,364
Other non-current liabilities	118,601	115,168
Total liabilities	3,325,073	3,418,928
NuStar Energy partners' equity	1,570,343	1,611,617
Total liabilities and partners’ equity	$ 4,895,416	$ 5,030,545