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PROPERTY, PLANT AND EQUIPMENT - Schedule of Property, Plant and Equipment (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Property, Plant and Equipment [Line Items] |  |
Property, plant and equipment, gross | $ 4,141,585 | $ 3,699,416
Less - accumulated depreciation and amortization | 2,278,410 | 2,174,118
Total property, plant and equipment, net | 1,863,175 | 1,525,298
Land |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant and equipment, gross | 165,010 | 139,776
Asset retirement costs (non-landfill) |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant and equipment, gross | 19,105 | 16,407
Landfill assets |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant and equipment, gross | 205,873 | 191,687
Buildings and improvements |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant and equipment, gross | 551,795 | 509,804
Right-of-use assets, finance leases | 8,900 | 8,900
Camp equipment |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant and equipment, gross | 127,680 | 159,021
Vehicles |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant and equipment, gross | 912,836 | 844,026
Right-of-use assets, finance leases | 77,700 | 47,200
Equipment |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant and equipment, gross | 2,092,395 | 1,807,235
Right-of-use assets, finance leases | 9,300 | 9,300
Furniture and fixtures |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant and equipment, gross | 6,444 | 7,082
Construction in progress |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant and equipment, gross | $ 60,447 | $ 24,378

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