ASSETS HELD FOR SALE (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Discontinued Operations and Disposal Groups [Abstract]
Receivables, Net	$ 8,871	$ 9,902
Inventories, net	16,807	16,401
Other current assets	1,829	1,798
Property, plant, and equipment, net	4,673	4,821
Reserve for assets held for sale	(5,125)	(5,338)
Total assets held for sale, current	27,055	27,584
Accounts payable	(2,219)	(2,654)
Accrued expenses	(1,309)	(1,375)
Other current liabilities	(173)	(748)
Accrued pension and other postretirement benefits costs	(5,431)	(5,364)
Total liabilities held for sale, current	$ (9,132)	$ (10,141)