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LEASES - Right-of-use Assets Obtained in Exchange for New Leases (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Jun. 30, 2019
Sep. 30, 2019
Leases [Abstract]    
Right-of-use assets obtained in exchange for new operating lease liabilities $ 8,200 $ 8,175
Right-of-use assets obtained in exchange for new finance lease liabilities   $ 0