LEASES - SUPPLEMENTAL BALANCE SHEET INFORMATION RELATED TO LEASES (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Lease, Description [Line Items]
Operating lease ROU Assets	$ 224,268	$ 220,678
Finance lease ROU assets, net	88,065	93,917
Total leased assets	312,333	314,595
Operating lease liabilities, current	36,578	29,209
Finance lease liabilities, curent	4,868	4,079
Operating lease liabilities, non-current	181,871	184,163
Finance lease liabilities, non-current	75,887	75,564
Total leased liabilities	299,204	293,015
Property, plant and equipment, gross
Lease, Description [Line Items]
Finance lease ROU assets, net	101,426	101,142
Accumulated depreciation
Lease, Description [Line Items]
Finance lease ROU assets, net	13,361	7,225
Property, plant and equipment, net
Lease, Description [Line Items]
Finance lease ROU assets, net	$ 88,065	$ 93,917