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REVENUE RECOGNITION - Narrative (Details) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Rebates	$ (189,532,000)	$ (182,910,000)
Revenue recognized fro performance obligation satisfied in previous period	0	0
Gross receivables from contracts	67,062,000		$ 74,162,000
Contract liabilities	3,082,000		$ 2,685,000
Rebate for Recycled or Returned Organic Materials
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Rebates	$ 1,568,000	$ 991,000

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