REMEDIAL LIABILITIES (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2017 USD ($)
Accrual for Environmental Loss Contingencies [Roll Forward]
Balance at beginning of year	$ 128,007
Measurement period adjustments from prior period acquisitions	504
Accretion	3,513
Changes in estimates recorded to statement of operations	(55)
Expenditures	(7,457)
Currency translation and other	1,001
Balance at end of year	125,513
Remedial Liabilities for Landfill Sites
Accrual for Environmental Loss Contingencies [Roll Forward]
Balance at beginning of year	1,777
Measurement period adjustments from prior period acquisitions	0
Accretion	64
Changes in estimates recorded to statement of operations	(34)
Expenditures	(30)
Currency translation and other	(1)
Balance at end of year	1,776
Remedial Liabilities for Inactive Sites
Accrual for Environmental Loss Contingencies [Roll Forward]
Balance at beginning of year	64,151
Measurement period adjustments from prior period acquisitions	0
Accretion	1,976
Changes in estimates recorded to statement of operations	(277)
Expenditures	(3,099)
Currency translation and other	2,742
Balance at end of year	65,493
Remedial Liabilities (Including Superfund) for Non-Landfill Operations
Accrual for Environmental Loss Contingencies [Roll Forward]
Balance at beginning of year	62,079
Measurement period adjustments from prior period acquisitions	504
Accretion	1,473
Changes in estimates recorded to statement of operations	256
Expenditures	(4,328)
Currency translation and other	(1,740)
Balance at end of year	$ 58,244