PROPERTY, PLANT AND EQUIPMENT - Schedule of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 4,224,951	$ 4,141,585
Less - accumulated depreciation and amortization	2,343,409	2,278,410
Total property, plant and equipment, net	1,881,542	1,863,175
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	174,480	165,010
Asset retirement costs (non-landfill)
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	19,154	19,105
Landfill assets
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	208,481	205,873
Buildings and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	568,493	551,795
Right-of-Use assets, finance leases	8,000	8,900
Camp equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	129,304	127,680
Vehicles
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	926,148	912,836
Right-of-Use assets, finance leases	82,400	77,700
Equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	2,116,923	2,092,395
Right-of-Use assets, finance leases	9,300	9,300
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	6,390	6,444
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 75,578	$ 60,447