GOODWILL AND OTHER INTANGIBLE ASSETS - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Intangible Assets by Major Class [Line Items]
Aggregate amortization expense	$ 6,642	$ 4,979
Customer relationships
Intangible Assets by Major Class [Line Items]
Finite lived intangible assets, useful life	26 years 2 months 12 days
Customer relationships | Minimum
Intangible Assets by Major Class [Line Items]
Finite lived intangible assets, useful life	14 years
Customer relationships | Maximum
Intangible Assets by Major Class [Line Items]
Finite lived intangible assets, useful life	40 years
Covenants not-to-compete
Intangible Assets by Major Class [Line Items]
Finite lived intangible assets, weighted average remaining useful life	4 years 6 months
Covenants not-to-compete | Minimum
Intangible Assets by Major Class [Line Items]
Finite lived intangible assets, useful life	4 years
Covenants not-to-compete | Maximum
Intangible Assets by Major Class [Line Items]
Finite lived intangible assets, useful life	14 years
Tradenames
Intangible Assets by Major Class [Line Items]
Finite lived intangible assets, weighted average remaining useful life	16 years 4 months 24 days
Tradenames | Minimum
Intangible Assets by Major Class [Line Items]
Finite lived intangible assets, useful life	10 years
Tradenames | Maximum
Intangible Assets by Major Class [Line Items]
Finite lived intangible assets, useful life	40 years