GOODWILL AND OTHER INTANGIBLE ASSETS - Values of Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Intangible Assets by Major Class [Line Items]
Gross Carrying Amount	$ 808,133	$ 731,686
Accumulated Amortization	88,098	64,215
Net Value	720,035	667,471
Amortizable intangibles | Covenants not-to-compete [Member]
Intangible Assets by Major Class [Line Items]
Gross Carrying Amount	9,405	10,993
Accumulated Amortization	5,366	5,843
Net Value	4,039	5,150
Amortizable intangibles | Customer relationships [Member]
Intangible Assets by Major Class [Line Items]
Gross Carrying Amount	670,889	602,095
Accumulated Amortization	81,271	57,236
Net Value	589,618	544,859
Amortizable intangibles | Tradenames [Member]
Intangible Assets by Major Class [Line Items]
Gross Carrying Amount	5,283	4,922
Accumulated Amortization	1,031	712
Net Value	4,252	4,210
Amortizable intangibles | License agreements [Member]
Intangible Assets by Major Class [Line Items]
Gross Carrying Amount	611	720
Accumulated Amortization	416	420
Net Value	195	300
Amortizable intangibles | Other [Member]
Intangible Assets by Major Class [Line Items]
Gross Carrying Amount	91	89
Accumulated Amortization	14	4
Net Value	77	85
Indefinite lived intangibles | Operating permits [Member]
Intangible Assets by Major Class [Line Items]
Gross Carrying Amount	116,054	112,867
Net Value	116,054	112,867
Indefinite lived intangibles | Tradenames [Member]
Intangible Assets by Major Class [Line Items]
Gross Carrying Amount	5,800	0
Net Value	$ 5,800	$ 0