COMMITMENTS AND CONTINGENCIES (Details) $ in Millions	6 Months Ended
Jun. 30, 2020 USD ($)
COMMITMENTS AND CONTINGENCIES
Percentage of vehicles in which certain employees at some of the facilities altered emissions controls systems	5.00%
Litigation Settlement Accrual	$ 4.3

Amount of loss contingency liability.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=118942415&loc=d3e14326-108349

Name:	us-gaap_LossContingencyAccrualAtCarryingValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant