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LEASES - Lease Obligations - Minimum Future Rental Payments from Operating Leases (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Leases [Abstract]    
2020 (six months ending December 31, 2020) $ 1,730  
2021 3,502  
2022 2,697  
2023 2,697  
2024 2,697  
Thereafter 17,533  
Total lease payments 30,856  
Imputed interest (4,712)  
Present value of lease liability $ 26,144 $ 5,380