PROPERTY, PLANT AND EQUIPMENT (Schedule of Property, Plant and Equipment) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	$ 3,162,515	$ 2,977,904
Less - accumulated depreciation and amortization	1,550,544	1,366,077
Total property, plant and equipment, net	1,611,971	1,611,827
Land
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	121,806	120,575
Asset retirement costs (non-landfill)
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	14,905	14,567
Landfill assets
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	143,503	139,708
Buildings and improvements
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	411,006	373,160
Camp equipment
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	171,163	152,740
Vehicles
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	613,767	541,022
Equipment
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	1,628,256	1,483,736
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	5,586	5,492
Construction in progress
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	$ 52,523	$ 146,904