GOODWILL AND OTHER INTANGIBLE ASSETS - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Intangible Assets by Major Class [Line Items]
Indefinite lived intangible assets, facility environmental permits	$ 14,500,000	$ 16,500,000
Amortization	16,269,000	9,919,000	5,390,000
Customer relationships
Intangible Assets by Major Class [Line Items]
Assigned finite lived intangible asset	190,400,000	97,100,000
Intangible assets amortization periods (in years), minimum	14	15
Intangible assets amortization periods (in years), maximum	40	40
Market Approach, Goodwill Impairment Test
Intangible Assets by Major Class [Line Items]
Goodwill impairment test, average stock price, period (in days)	30
Market Approach, Goodwill Impairment Test | Lower Limit
Intangible Assets by Major Class [Line Items]
Goodwill impairment test, fair value exceeding book value, percentage	100.00%
Income Approach, Goodwill Impairment Test | Lower Limit
Intangible Assets by Major Class [Line Items]
Goodwill impairment test, fair value exceeding book value, percentage	100.00%
Operating permits
Intangible Assets by Major Class [Line Items]
Write-down of indefinite-lived intangible asset, facility environmental permits	$ 2,800,000	$ 600,000