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COMMITMENTS AND CONTINGENCIES - Additional Information (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 11, 2015
Dec. 31, 2019
Estimated Duties That Could Be Owed    
Commitments and Contingencies Disclosure [Line Items]    
Reasonable possible loss   $ 3.1
Negligence    
Commitments and Contingencies Disclosure [Line Items]    
Reasonable possible loss   6.2
Gross Negligence    
Commitments and Contingencies Disclosure [Line Items]    
Reasonable possible loss   12.4
Capital cost    
Commitments and Contingencies Disclosure [Line Items]    
Remedial alternative, EPA preferred remedy $ 17.3  
Capital cost | San German Ground Water Contamination Site Initial Operable Unit    
Commitments and Contingencies Disclosure [Line Items]    
Remedial alternative, EPA preferred remedy   $ 7.3