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LEASES - Right-of-use Assets Obtained in Exchange for New Leases (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Leases [Abstract]    
Right-of-use assets obtained in exchange for new operating lease liabilities $ 77 $ 8,175
Right-of-use assets obtained in exchange for new finance lease liabilities $ 0 $ 0