SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Defined Benefit Pension Plan (Details)	12 Months Ended
Dec. 31, 2019 plan
Multiemployer Pension Plans \| New England Teamsters and Trucking Industry Pension Fund
Multiemployer Plans [Line Items]
Number of plans	1

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.

No definition available.

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Namespace Prefix:	us-gaap_
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Balance Type:	na
Period Type:	duration