ACCRUED EXPENSES AND OTHER LIABILITIES (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
ACCRUED EXPENSES AND OTHER LIABILITIES
Brokerage and escorts	$ 11.9	$ 16.9
Other accrued expenses	6.8	7.3
Owner-operator deposits	7.8	7.1
Unvouchered payables	6.1	7.5
Income taxes payable		1.9
Accrued property taxes and sales taxes payable	1.5	1.7
Fuel and fuel taxes	1.1	1.3
Interest	0.5	0.5
Total	$ 35.7	$ 44.2