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COMMITMENTS AND CONTINGENCIES - Narrative (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020	Mar. 26, 2020
Line of Credit Facility [Line Items]
Term of lease contract, maximum renewal term	12 years
Purchase obligation	$ 177,200,000
Section 301 Tariff Refunds
Line of Credit Facility [Line Items]
Potential positive impact of approval of requested Tariff refunds			$ 38,900,000
Tariff refund	14,700,000	$ 24,800,000
Tariff refund receivable	$ 0	14,700,000
Recognized in current period		38,900,000
Section 301 Tariff Refunds, Accrued Interest
Line of Credit Facility [Line Items]
Potential positive impact of approval of requested Tariff refunds			$ 600,000
Recognized in current period		$ 600,000

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- Definition

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- Definition

Amount of gain recognized in the period that had been disclosed in prior periods as a contingent gain.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 30
-Section 50
-Paragraph 1
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- Definition

The amount or range of possible amounts of gain that could be realized upon the resolution of a contingency.

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- Definition

Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Minimum amount of purchase arrangement in which the entity has agreed to expend funds to procure goods or services from a supplier.

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