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INCOME TAXES - Operating loss carryforward (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Oct. 01, 2019
INCOME TAXES      
Expiration of net operating losses     $ 454,200
Deferred tax expense $ 0    
Net operating loss carryforwards 1,100    
Net operating loss carryforward subject expiration in 2037 $ 105,600    
Carryforward period of NOLs that will expire in 2037 20 years    
Net operating carryforward not subject to expiration $ 539,200    
Valuation allowance 431,694 $ 489,539  
Increase in valuation allowance (57,800)    
Unrecognized tax benefits $ 0 0  
Open tax year (in years) 3 years    
Interest and penalties $ 0 $ 0