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SUMMARY OF SIGNIFICANT ACCOUNTING AND BUSINESS POLICIES - Variable Interest Entity (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Risks and Uncertainties [Abstract]      
Assets $ 906,192 $ 868,131  
Fixed assets 51,880 56,899  
Income tax benefit $ (3,431) 18,696 $ (11,194)
Employees      
Risks and Uncertainties [Abstract]      
Ownership percentage in VIE 52.50%    
Variable Interest Entity, Primary Beneficiary      
Risks and Uncertainties [Abstract]      
Ownership percentage in VIE 47.50%    
Assets $ 3,500    
Fixed assets 2,800    
Increase (decrease) in cost of sales 1,800 (800)  
Income tax benefit $ 150 $ 116