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LEASES - Components of Lease Expense and Payments (Details) - USD ($)
$ in Thousands
 3 Months Ended 15 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Mar. 31, 2024
Dec. 31, 2023
LEASES        
Operating lease cost $ 5,479 $ 5,981    
Short-term lease cost 691 677    
Variable lease cost 1,429 662    
Total operating lease cost 7,599 7,320    
Finance lease cost:        
Amortization of right-of-use asset 612 699    
Variable costs 198 203    
Interest costs 100 84    
Total finance lease cost 910 986    
Payments for lease liabilities 4,800 5,000    
Lease liabilities arising from right of use assets 2,300 2,900    
Right of use assets terminated 5,600 5,000 $ 5,600  
Lease liabilities terminated 5,900 5,300 5,900  
Gain on lease termination   300 300  
Finance leases cost included in property, plant and equipment 31,700   31,700 $ 31,700
Accumulated amortization related to finance leases 17,000   17,000 16,400
Principal payments, finance lease liabilities 443 249    
Investing cash flows for finance lease liabilities   900    
Operating cash flows for finance lease liabilities 100 $ 100    
Finance lease liability 5,207   5,207 $ 5,641
Finance lease liability, current $ 1,800   $ 1,800