PROPERTY, PLANT AND EQUIPMENT - Schedule of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 3,527,280	$ 3,593,814
Less - accumulated depreciation and amortization	1,980,161	2,005,663
Total property, plant and equipment, net	1,547,119	1,588,151
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	134,483	131,023
Asset retirement costs (non-landfill)
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	15,863	15,924
Landfill assets
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	179,217	182,276
Buildings and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	491,415	499,159
Buildings and improvements, finance lease [Member]
Property, Plant and Equipment [Line Items]
Finance Lease, Right-of-Use Asset, Before Accumulated Amortization	8,000	31,000
Camp equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	150,279	158,277
Vehicles
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	782,669	785,056
Vehicles, finance lease
Property, Plant and Equipment [Line Items]
Finance Lease, Right-of-Use Asset, Before Accumulated Amortization	23,500	2,400
Equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,743,261	1,779,366
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	6,804	6,054
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 23,289	$ 36,679