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PROPERTY, PLANT AND EQUIPMENT - Schedule of Property, Plant and Equipment (Details) - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019
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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

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