REVENUE FROM CONTRACTS WITH CUSTOMERS - Narrative (Details) - Revenue from Contract with Customer Benchmark - Customer Concentration Risk - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Related Party
Disaggregation of Revenue [Line Items]
Percentage of net sales	17.40%	19.30%	18.50%
Revenues	$ 282.5	$ 302.2	$ 266.8
PACCAR
Disaggregation of Revenue [Line Items]
Percentage of net sales	15.60%	16.20%	15.10%
Traton Group
Disaggregation of Revenue [Line Items]
Percentage of net sales	11.80%	12.00%	11.70%