REMEDIAL LIABILITIES - Changes to Remedial Liabilities (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2025 USD ($)
Accrual for Environmental Loss Contingencies [Roll Forward]
Beginning balance	$ 111,745
Measurement period adjustment from a prior period acquisition	(90)
Accretion	1,049
Changes in estimates recorded to consolidated statement of operations	(10,506)
Expenditures	(2,332)
Currency translation and other	9
Ending balance	99,875
Remedial Liabilities for Landfill Sites
Accrual for Environmental Loss Contingencies [Roll Forward]
Beginning balance	1,948
Measurement period adjustment from a prior period acquisition	0
Accretion	23
Changes in estimates recorded to consolidated statement of operations	0
Expenditures	(11)
Currency translation and other	0
Ending balance	1,960
Remedial Liabilities for Inactive Sites
Accrual for Environmental Loss Contingencies [Roll Forward]
Beginning balance	57,036
Measurement period adjustment from a prior period acquisition	0
Accretion	587
Changes in estimates recorded to consolidated statement of operations	51
Expenditures	(749)
Currency translation and other	67
Ending balance	56,992
Remedial Liabilities (Including Superfund) for Non-Landfill Operations
Accrual for Environmental Loss Contingencies [Roll Forward]
Beginning balance	52,761
Measurement period adjustment from a prior period acquisition	(90)
Accretion	439
Changes in estimates recorded to consolidated statement of operations	(10,557)
Expenditures	(1,572)
Currency translation and other	(58)
Ending balance	$ 40,923