CONTINGENCIES AND COMMITMENTS - Additional Information (Detail) (USD $) In Millions	6 Months Ended
	Jun. 30, 2011	Dec. 31, 2010
Loss Contingencies [Line Items]
Environmental reserves, measured on an undiscounted basis	$ 7.5	$ 7.5
Environmental reserves, measured on an undiscounted basis, current	5.1	4.8
Reasonably possible additional environmental costs estimated to be incurred beyond the amounts accrued	$ 0.7