PREPAID EXPENSES AND OTHER - Prepaid Expenses and Other Current Assets (Details) - USD ($)	Mar. 31, 2022	Dec. 31, 2021
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Chassis converter pool agreements	$ 4,923,000	$ 18,185,000
Assets held for sale	0	350,000
Income tax receivables	3,836,000	10,386,000
Insurance premiums & maintenance/subscription agreements	7,054,000	3,290,000
Commodity swap contracts	27,067,000	7,963,000
All other	3,494,000	3,621,000
Prepaid expenses and other current assets	46,374,000	43,795,000
Restricted cash	$ 0	$ 0