COMMITMENTS AND CONTINGENCIES - Additional Information (Detail) (USD $)	1 Months Ended		9 Months Ended			9 Months Ended		1 Months Ended	9 Months Ended	12 Months Ended
	Feb. 28, 2009 Parties	Sep. 30, 2003 Parties	Sep. 30, 2013 Cases	Sep. 30, 2012	Dec. 31, 2012	Sep. 30, 2013 Subsequent [Member]	Sep. 30, 2013 Initial [Member]	May 31, 2007 MTBE [Member] Defendant	Sep. 30, 2013 MTBE [Member] Parties	Dec. 31, 2010 MTBE [Member] Cases
Commitments And Contingencies [Line Items]
Accrued legal matters			$ 9,068,000		$ 3,615,000
Provisions for litigation losses			5,471,000	128,000
Number of potentially responsible parties for Lower Passaic River damages		66
Parties to perform a remedial investigation and feasibility study								70
Number of additional parties	300
Petroleum refiners, manufacturers, distributors and retailers									50
Agreements to settle										2,025,000
Classes settled										2
Claims settled, number of cases										52
Number of cases in which we remain a defendant			1
Settlement claims from the plaintiffs						88,000,000	24,000,000
Losses related to New Jersey MDL proceedings.			$ 6,000,000