ORGANIZATION AND DESCRIPTION OF THE BUSINESS AND FINANCIAL STATEMENT PRESENTATION (Organization) (Details) $ in Millions	6 Months Ended
	Jun. 30, 2020 USD ($) segment	Dec. 31, 2019 USD ($)
Organization and description of business
Number of reportable operating segments | segment	3
Allowance for credit losses on trade accounts receivable | $	$ 3.0	$ 1.8
Asset-Based
Organization and description of business
Percentage of the Company's revenues, before other revenues and intercompany eliminations, represented by the Asset-Based segment	70.00%
Asset-Based | Unionized employees concentration risk | Number of employees
Organization and description of business
Percentage of Asset-Based segment employees covered under collective bargaining agreement with the IBT	81.00%