PROPERTY, PLANT AND EQUIPMENT (Schedule of Property, Plant and Equipment) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	$ 3,083,169	$ 2,977,904
Less - accumulated depreciation and amortization	1,480,716	1,366,077
Total property, plant and equipment, net	1,602,453	1,611,827
Land
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	121,114	120,575
Asset retirement costs (non-landfill)
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	14,861	14,567
Landfill assets
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	141,878	139,708
Buildings and improvements
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	406,030	373,160
Camp equipment
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	168,524	152,740
Vehicles
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	564,723	541,022
Equipment
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	1,605,581	1,483,736
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	5,524	5,492
Construction in progress
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	$ 54,934	$ 146,904