GOODWILL AND OTHER INTANGIBLE ASSETS - Values of Intangible Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Intangible Assets by Major Class [Line Items]
Gross Carrying Amount	$ 1,993,586	$ 1,024,567
Accumulated Amortization	151,025	114,922
Net Value	1,842,561	909,645	$ 720,035
Amortizable intangibles | Customer relationships
Intangible Assets by Major Class [Line Items]
Gross Carrying Amount	1,304,388	755,148
Accumulated Amortization	144,020	107,365
Net Value	1,160,368	647,783
Amortizable intangibles | Covenants not-to-compete
Intangible Assets by Major Class [Line Items]
Gross Carrying Amount	6,878	8,474
Accumulated Amortization	5,141	5,688
Net Value	1,737	2,786
Amortizable intangibles | Tradenames
Intangible Assets by Major Class [Line Items]
Gross Carrying Amount	3,819	6,062
Accumulated Amortization	948	1,313
Net Value	2,871	4,749
Amortizable intangibles | Other intangibles
Intangible Assets by Major Class [Line Items]
Gross Carrying Amount	18,902	1,150
Accumulated Amortization	916	556
Net Value	17,986	594
Indefinite lived intangibles | Operating permits
Intangible Assets by Major Class [Line Items]
Gross Carrying Amount	233,101	247,933
Net Value	233,101	247,933
Indefinite lived intangibles | Tradenames
Intangible Assets by Major Class [Line Items]
Gross Carrying Amount	426,498	5,800
Net Value	$ 426,498	$ 5,800