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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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