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LEASES - Components of Lease Expense and Payments (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
USD ($)
LEASES  
Operating lease cost $ 15,194
Short-term lease cost 3,426
Variable lease cost 2,803
Total operating lease cost 21,423
Payments for lease liabilities 15,100
Lease liabilities arising from right-of-use assets 9,700
Finance lease cost:  
Amortization of right-of-use asset 2,318
Variable costs 964
Total finance lease cost 3,282
Finance leases cost included in property, plant and equipment $ 25,900
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] us-gaap:PropertyPlantAndEquipmentGross
Accumulated depreciation related to finance leases $ 9,400