INVESTMENT IN NUSTAR ENERGY Table 3 (Details) - NuStar Energy LP [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement of Income Information:
Revenues	$ 1,814,019	$ 1,756,682	$ 2,084,040
Operating income	336,278	359,109	390,704
Income from continuing operations	147,964	150,003	305,946
Income (loss) from discontinued operations, net of tax	0	0	774
Net income	$ 147,964	$ 150,003	$ 306,720