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COMMITMENTS AND CONTINGENCIES Minimum Lease Payments (Details)
$ in Thousands
Dec. 31, 2017
USD ($)
Minimum Future Lease Payments under Non-cancelable Operating Leases [Line Items]  
2018 $ 3,865
2019 3,865
2020 3,932
2021 3,998
2022 4,078
Thereafter 3,515
Total $ 23,253