LEASES (Supplemental Finance Lease Balance Sheet information) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
ROU assets:
Finance lease (included in property, plant and equipment, net)	$ 60,271	$ 32,307
Current portion of lease liabilities:
Finance lease (included in accrued expenses)	$ 5,840	$ 801
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:AccruedLiabilitiesCurrent	us-gaap:AccruedLiabilitiesCurrent
Long-term portion of lease liabilities:
Finance lease (included in deferred taxes, unrecognized tax benefits and other long-term liabilities)	$ 55,038	$ 34,517
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesNoncurrent	us-gaap:OtherLiabilitiesNoncurrent