REMEDIAL LIABILITIES (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2019 USD ($)
Accrual for Environmental Loss Contingencies [Roll Forward]
Balance at January 1, 2019	$ 121,017
Accretion	3,411
Changes in estimates recorded to statement of operations	(727)
Expenditures	(6,699)
Currency translation and other	267
Balance at June 30, 2019	117,269
Remedial Liabilities for Landfill Sites
Accrual for Environmental Loss Contingencies [Roll Forward]
Balance at January 1, 2019	1,838
Accretion	66
Changes in estimates recorded to statement of operations	23
Expenditures	(44)
Currency translation and other	0
Balance at June 30, 2019	1,883
Remedial Liabilities for Inactive Sites
Accrual for Environmental Loss Contingencies [Roll Forward]
Balance at January 1, 2019	65,315
Accretion	2,002
Changes in estimates recorded to statement of operations	(100)
Expenditures	(3,658)
Currency translation and other	18
Balance at June 30, 2019	63,577
Remedial Liabilities (Including Superfund) for Non-Landfill Operations
Accrual for Environmental Loss Contingencies [Roll Forward]
Balance at January 1, 2019	53,864
Accretion	1,343
Changes in estimates recorded to statement of operations	(650)
Expenditures	(2,997)
Currency translation and other	249
Balance at June 30, 2019	$ 51,809