IMPAIRMENT AND OTHER CHARGES - (Details) - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
IMPAIRMENT AND OTHER CHARGES
Abandonment of assets	$ 34,575,000	$ 34,575,000
Assets held for sale write down	14,326,000	14,326,000
Retirement of equipment	15,953,000	15,953,000
Inventory write-downs	5,501,000	5,501,000
Severance costs	1,268,000	1,268,000
Other	27,000	27,000
Total	$ 71,650,000	$ 71,650,000