REMEDIAL LIABILITIES (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2018 USD ($)
Accrual for Environmental Loss Contingencies [Roll Forward]
Balance at beginning of year	$ 124,468
Accretion	3,533
Changes in estimates recorded to statement of operations	(701)
Expenditures	(6,182)
Currency translation and other	(406)
Balance at end of year	120,712
Remedial Liabilities for Landfill Sites
Accrual for Environmental Loss Contingencies [Roll Forward]
Balance at beginning of year	1,800
Accretion	64
Changes in estimates recorded to statement of operations	0
Expenditures	(35)
Currency translation and other	0
Balance at end of year	1,829
Remedial Liabilities for Inactive Sites
Accrual for Environmental Loss Contingencies [Roll Forward]
Balance at beginning of year	65,342
Accretion	2,074
Changes in estimates recorded to statement of operations	(56)
Expenditures	(2,911)
Currency translation and other	892
Balance at end of year	65,341
Remedial Liabilities (Including Superfund) for Non-Landfill Operations
Accrual for Environmental Loss Contingencies [Roll Forward]
Balance at beginning of year	57,326
Accretion	1,395
Changes in estimates recorded to statement of operations	(645)
Expenditures	(3,236)
Currency translation and other	(1,298)
Balance at end of year	$ 53,542