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COMMITMENTS AND CONTINGENCIES - Narrative (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Loss Contingencies [Line Items]
Loss contingency, estimate of possible loss	$ 100
Purchase obligation	86,900
Chassis converter pool agreements	17,767	$ 10,164
Standby Letters of Credit
Loss Contingencies [Line Items]
Letters of credit outstanding, amount	6,800
Chassis Converter Pool Agreements
Loss Contingencies [Line Items]
Other inventory, gross	$ 2,600

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- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

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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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- Definition

Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
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- Definition

Amount before valuation and LIFO reserves of other inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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- Definition

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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- Definition

The liability incurred for chassis converter pool agreement classified as current.

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