GOODWILL AND OTHER INTANGIBLE ASSETS - Values of Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Intangible Assets by Major Class [Line Items]
Gross Carrying Amount	$ 1,030,870	$ 808,133
Accumulated Amortization	104,332	88,098
Net Value	926,538	720,035
Amortizable intangibles | Covenants not-to-compete
Intangible Assets by Major Class [Line Items]
Gross Carrying Amount	9,423	9,405
Accumulated Amortization	6,026	5,366
Net Value	3,397	4,039
Amortizable intangibles | Customer relationships
Intangible Assets by Major Class [Line Items]
Gross Carrying Amount	753,243	670,889
Accumulated Amortization	96,395	81,271
Net Value	656,848	589,618
Amortizable intangibles | Tradenames
Intangible Assets by Major Class [Line Items]
Gross Carrying Amount	5,370	5,283
Accumulated Amortization	1,189	1,031
Net Value	4,181	4,252
Amortizable intangibles | Technology
Intangible Assets by Major Class [Line Items]
Gross Carrying Amount	20,291	611
Accumulated Amortization	703	416
Net Value	19,588	195
Amortizable intangibles | Other
Intangible Assets by Major Class [Line Items]
Gross Carrying Amount	336	91
Accumulated Amortization	19	14
Net Value	317	77
Indefinite lived intangibles | Operating permits
Intangible Assets by Major Class [Line Items]
Gross Carrying Amount	236,407	116,054
Net Value	236,407	116,054
Indefinite lived intangibles | Tradenames
Intangible Assets by Major Class [Line Items]
Gross Carrying Amount	5,800	5,800
Net Value	$ 5,800	$ 5,800