COMMITMENTS AND CONTINGENCIES - Additional Information (Details) $ in Thousands	Dec. 31, 2019 USD ($)
Long-term debt
Less than One Year	$ 5,038
Lease obligations
Total	20,774
Less than One Year	1,309
One to Three Years	5,018
Three to Five Years	5,953
More than Five Years	8,494
Manufacturing and service contracts
Total	600,269
Less than One Year	64,354
One to Three Years	83,107
Three to Five Years	113,202
Purchase Obligation, Due after Fifth Year	339,606
Total contractual obligations and commitments
Total	694,048
Less than One Year	70,794
One to Three Years	136,106
Three to Five Years	139,048
More than Five Years	348,100
Term Loan
Long-term debt
Total	72,865
Less than One Year	5,038
One to Three Years	47,934
Three to Five Years	19,893
More than Five Years	0
Tenant Improvement Loan
Long-term debt
Total	140
Less than One Year	93
One to Three Years	47
Three to Five Years	0
More than Five Years	$ 0