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COMMITMENTS AND CONTINGENCIES (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Operating Leases      
2021 $ 19,183    
2022 15,990    
2023 10,571    
2024 6,084    
2025 3,924    
Thereafter 7,271    
Total lease payments 63,023    
Lease expenses $ 23,400 $ 25,000  
Rental expense for operating leases     $ 18,500