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COMMITMENTS AND CONTINGENCIES (Details) - USD ($)
3 Months Ended
Mar. 31, 2019
Mar. 31, 2017
Dec. 31, 2018
Brazil      
Commitments and contingencies      
Environmental Remediation Expense $ 0 $ 1,500,000  
Brazil | Reduction of gross receipts tax      
Commitments and contingencies      
Estimated potential recoveries   $ 13,400,000  
Recovery of part of claim 2,700,000    
Brazil | Reduction of gross receipts tax | Cost of Sales      
Commitments and contingencies      
Recovery of part of claim 1,700,000    
Brazil | Reduction of gross receipts tax | Interest Income      
Commitments and contingencies      
Recovery of part of claim 1,000,000    
Brazil | Minimum      
Commitments and contingencies      
Environmental Loss Contingencies Estimate 1,500,000    
Brazil | Maximum      
Commitments and contingencies      
Environmental Loss Contingencies Estimate 3,000,000    
Indemnification agreements      
Commitments and contingencies      
Liabilities recorded under indemnification agreements $ 0   $ 0