ACQUISITIONS AND DISPOSITIONS - Other (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended	3 Months Ended	9 Months Ended	1 Months Ended	9 Months Ended		1 Months Ended
	Oct. 05, 2012 Aggregate assets - New Jersey Installments	Jun. 30, 2012 Aggregate assets - New Jersey	Sep. 30, 2013 Aggregate assets - New Jersey	Oct. 31, 2010 West Texas Market - 3 Plants Processing_Facility	Sep. 30, 2013 West Texas Market - 3 Plants	Sep. 30, 2012 West Texas Market - 3 Plants	Jan. 31, 2012 Redemption of Subsidiary Interest	Sep. 30, 2010 Redemption of Subsidiary Interest	Aug. 31, 2010 Redemption of Subsidiary Interest
Business Acquisition [Line Items]
Accrued liabiliities		$ 1.4
Payment in lieu of contractual obligation	1.0
Promissory notes issued as partial consideration	1.0			2.6				1.5
Number of equal installments	8
Stated interest rate	2.50%			5.00%
Repayments of notes issued on acquisition			0.4		0.3	0.3
Number of plants acquired				3
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net				3.0
Cash paid on acquisition				0.4
Percentage of ownership interest redeemed (in hundredths)									60.00%
Payments for redemption of interest							$ 0.8	$ 0.6