INVESTMENT IN NUSTAR ENERGY Table 2 (Details) (NuStar Energy [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
NuStar Energy [Member]
Statement of Comprehensive Income Information:
Revenues	$ 1,735,692	$ 1,234,616
Operating income	48,321	55,731
Net income	$ 26,254	$ 28,516