REMEDIAL LIABILITIES - Changes to Remedial Liabilities (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2024 USD ($)
Accrual for Environmental Loss Contingencies [Roll Forward]
Beginning balance	$ 111,243
Accretion	1,921
Changes in estimates recorded to consolidated statement of operations	4,145
Expenditures	(5,270)
Currency translation and other	(440)
Ending balance	111,599
Remedial Liabilities for Landfill Sites
Accrual for Environmental Loss Contingencies [Roll Forward]
Beginning balance	1,880
Accretion	44
Changes in estimates recorded to consolidated statement of operations	15
Expenditures	(26)
Currency translation and other	0
Ending balance	1,913
Remedial Liabilities for Inactive Sites
Accrual for Environmental Loss Contingencies [Roll Forward]
Beginning balance	60,277
Accretion	1,134
Changes in estimates recorded to consolidated statement of operations	713
Expenditures	(1,801)
Currency translation and other	(9)
Ending balance	60,314
Remedial Liabilities (Including Superfund) for Non-Landfill Operations
Accrual for Environmental Loss Contingencies [Roll Forward]
Beginning balance	49,086
Accretion	743
Changes in estimates recorded to consolidated statement of operations	3,417
Expenditures	(3,443)
Currency translation and other	(431)
Ending balance	$ 49,372