INVESTMENT IN NUSTAR ENERGY Table 2 (Details) - NuStar Energy [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Statement of Comprehensive Income Information:
Revenues	$ 435,488	$ 437,804	$ 922,918	$ 843,507
Operating income	73,404	91,217	170,543	185,782
Net income	$ 26,250	$ 52,517	$ 84,190	$ 109,918