DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION (Details)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2012 Segment
DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION [Abstract]
Number of reportable segments	2	2
Number of uniquely licensed and permitted treatment and storage facilities	4	4
Business Acquisition [Line Items]
Number of non-operational facilities	2	2