REMEDIAL LIABILITIES (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Accrual for Environmental Loss Contingencies [Roll Forward]
Balance at beginning of year	$ 121,017
Accretion	1,143
Changes in estimates recorded to statement of operations	(814)
Expenditures	(2,472)
Currency translation and other	87
Balance at end of year	118,961
Remedial Liabilities for Landfill Sites
Accrual for Environmental Loss Contingencies [Roll Forward]
Balance at beginning of year	1,838
Accretion	22
Changes in estimates recorded to statement of operations	23
Expenditures	(15)
Currency translation and other	0
Balance at end of year	1,868
Remedial Liabilities for Inactive Sites
Accrual for Environmental Loss Contingencies [Roll Forward]
Balance at beginning of year	65,315
Accretion	675
Changes in estimates recorded to statement of operations	172
Expenditures	(1,154)
Currency translation and other	10
Balance at end of year	65,018
Remedial Liabilities (Including Superfund) for Non-Landfill Operations
Accrual for Environmental Loss Contingencies [Roll Forward]
Balance at beginning of year	53,864
Accretion	446
Changes in estimates recorded to statement of operations	(1,009)
Expenditures	(1,303)
Currency translation and other	77
Balance at end of year	$ 52,075