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IMPAIRMENT AND OTHER CHARGES (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
IMPAIRMENT AND OTHER CHARGES    
Long-lived asset impairments (1) $ 0 $ 204,765
Severance costs 0 395
Other 0 376
Total $ 0 $ 205,536