OTHER ACCRUED LIABILITIES - Narrative (Details)	9 Months Ended
	Sep. 30, 2021
Minimum
Accrued Liabilities [Line Items]
Warranty coverage period	1 year
Maximum
Accrued Liabilities [Line Items]
Warranty coverage period	5 years
DuraPlate Trailer Panels
Accrued Liabilities [Line Items]
Warranty coverage period	10 years