GOODWILL AND OTHER INTANGIBLE ASSETS - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Intangible Assets by Major Class [Line Items]
Amortization	$ 4,979	$ 3,347
Customer relationships
Intangible Assets by Major Class [Line Items]
Finite lived intangible assets useful life, Minimum	15
Finite lived intangible assets useful life, Maximum	40
Finite lived intangible assets, weighted average remaining useful life	28.1
Covenants not-to-compete
Intangible Assets by Major Class [Line Items]
Finite lived intangible assets useful life, Minimum	2
Finite lived intangible assets useful life, Maximum	10
Finite lived intangible assets, weighted average remaining useful life	5.2
Tradenames
Intangible Assets by Major Class [Line Items]
Finite lived intangible assets useful life, Minimum	15
Finite lived intangible assets useful life, Maximum	40
Finite lived intangible assets, weighted average remaining useful life	15.4