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LEASES (Lease Cost) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Leases [Abstract]    
Operating lease cost $ 4,082 $ 8,536
Operating lease cost—related party 0 5,610
Variable lease cost 224 429
Variable lease cost—related party 0 31,453
Short-term lease cost 2,810 0
Total lease cost $ 7,116 $ 46,028