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COMMITMENTS AND CONTINGENCIES - Future Minimum Rental Commitments (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract]      
2020 $ 2,157    
2021 2,130    
2022 1,846    
2023 1,803    
2024 1,753    
Thereafter 19,503    
Total 29,192    
Rent expense for long-term leases $ 4,326    
Rent expense for long-term leases   $ 2,000 $ 1,500