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REMEDIAL LIABILITIES (Details)
$ in Thousands
6 Months Ended
Jun. 30, 2020
USD ($)
Accrual for Environmental Loss Contingencies [Roll Forward]  
Balance at January 1, 2020 $ 114,173
Accretion 2,151
Changes in estimates recorded to statement of operations 1,140
Expenditures (4,359)
Currency translation and other (622)
Balance at June 30, 2020 112,483
Remedial Liabilities for Landfill Sites  
Accrual for Environmental Loss Contingencies [Roll Forward]  
Balance at January 1, 2020 1,851
Accretion 44
Changes in estimates recorded to statement of operations (14)
Expenditures (30)
Currency translation and other 0
Balance at June 30, 2020 1,851
Increase of remedial liabilities 1,800
Remedial Liabilities for Inactive Sites  
Accrual for Environmental Loss Contingencies [Roll Forward]  
Balance at January 1, 2020 61,991
Accretion 1,265
Changes in estimates recorded to statement of operations (330)
Expenditures (2,171)
Currency translation and other (923)
Balance at June 30, 2020 59,832
Remedial Liabilities (Including Superfund) for Non-Landfill Operations  
Accrual for Environmental Loss Contingencies [Roll Forward]  
Balance at January 1, 2020 50,331
Accretion 842
Changes in estimates recorded to statement of operations 1,484
Expenditures (2,158)
Currency translation and other 301
Balance at June 30, 2020 $ 50,800