ORGANIZATION AND BASIS OF PRESENTATION (Details)	0 Months Ended
	Sep. 30, 2011	Jun. 01, 2011	Mar. 31, 2012
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Exploratory and development interests in foreign countries (in ones)			2
Percentage of subsidiary common stock sold in initial public offering (as a percent)		18.00%
Percentage of subsidiary stock distributed in spin-off (as a percent)	82.00%