REMEDIAL LIABILITIES (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($)
Accrual for Environmental Loss Contingencies [Roll Forward]
Balance at beginning of year	$ 124,468
Accretion	1,165
Changes in estimates recorded to statement of operations	(592)
Expenditures	(2,208)
Currency translation and other	(386)
Balance at end of year	122,447
Remedial Liabilities for Landfill Sites
Accrual for Environmental Loss Contingencies [Roll Forward]
Balance at beginning of year	1,800
Accretion	21
Changes in estimates recorded to statement of operations	0
Expenditures	(12)
Currency translation and other	0
Balance at end of year	1,809
Remedial Liabilities for Inactive Sites
Accrual for Environmental Loss Contingencies [Roll Forward]
Balance at beginning of year	65,342
Accretion	672
Changes in estimates recorded to statement of operations	(24)
Expenditures	(826)
Currency translation and other	(9)
Balance at end of year	65,155
Remedial Liabilities (Including Superfund) for Non-Landfill Operations
Accrual for Environmental Loss Contingencies [Roll Forward]
Balance at beginning of year	57,326
Accretion	472
Changes in estimates recorded to statement of operations	(568)
Expenditures	(1,370)
Currency translation and other	(377)
Balance at end of year	$ 55,483