COMMITMENTS AND CONTINGENCIES (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2020	Dec. 31, 2019	Jun. 30, 2020	Mar. 31, 2019	Dec. 31, 2018
Brazil
Commitments and contingencies
Environmental remediation expense	$ 1,500,000
Payments to settle environmental loss contingency		$ 100,000	$ 600,000
Accrual for environmental loss contingencies		300,000
Brazil | Reduction of gross receipts tax
Commitments and contingencies
Recovery of part of claim				$ 700,000	$ 2,700,000	$ 631,000
Brazil | Reduction of gross receipts tax | Cost of sales
Commitments and contingencies
Recovery of part of claim				$ 700,000	1,700,000
Brazil | Reduction of gross receipts tax | Interest Income
Commitments and contingencies
Recovery of part of claim					$ 1,000,000.0
Brazil | Minimum | Reduction of gross receipts tax
Commitments and contingencies
Estimated potential recoveries		1,500,000
Brazil | Maximum | Reduction of gross receipts tax
Commitments and contingencies
Estimated potential recoveries		7,500,000
Indemnification agreements
Commitments and contingencies
Liabilities recorded under indemnification agreements		0
Tax Assessment | Brazil
Commitments and contingencies
Loss contingency liability recorded		$ 0
Estimated loss contingency			6,100,000
Tax Assessment, Interest | Brazil
Commitments and contingencies
Estimated loss contingency			2,300,000
Tax Assessment, Penalites | Brazil
Commitments and contingencies
Estimated loss contingency			$ 800,000