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INCOME TAXES (Narrative) (Details)
$ in Thousands, ¥ in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2021
USD ($)
Dec. 31, 2021
HKD ($)
Dec. 31, 2021
CNY (¥)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Operating Loss Carryforwards [Line Items]          
Income tax paid $ 108,099     $ 12,808 $ 5,546
Valuation allowance 816     709 $ 729
Deferred tax liabilities $ 16,726     $ 3,461  
Percentage of distributable profit recorded as deferred tax liability 20.18% 20.18% 20.18%    
Statutory enterprise income tax rate 25.00% 25.00% 25.00% 25.00% 25.00%
Income (loss) before income taxes $ 1,034,948     $ 162,130 $ 37,885
State Administration of Taxation, China          
Operating Loss Carryforwards [Line Items]          
Statutory enterprise income tax rate 25.00% 25.00% 25.00%    
Income (loss) before income taxes $ 1,046,200     179,600 49,800
PRC State Council, income tax rate 10.00% 10.00% 10.00%    
HONG KONG          
Operating Loss Carryforwards [Line Items]          
Amount of profit for which rate of tax changes   $ 2      
Minimum income tax rate 8.25% 8.25% 8.25%    
Maximum income tax rate 16.50% 16.50% 16.50%    
Outside PRC [Member]          
Operating Loss Carryforwards [Line Items]          
Statutory enterprise income tax rate 25.00% 25.00% 25.00%    
Income (loss) before income taxes $ 11,300     $ 17,500 12,000
Xinjiang Daqo [Member]          
Operating Loss Carryforwards [Line Items]          
Income tax paid | ¥     ¥ 0.1    
Deferred tax liabilities $ 14,500        
Percentage of distributable profit recorded as deferred tax liability 20.18% 20.18% 20.18%    
Preferential tax rate 15.00% 15.00% 15.00% 15.00%  
Minimum dividend distribution (in percent) 30.00%        
Chongqing Daqo New Energy Co., Ltd. [Member]          
Operating Loss Carryforwards [Line Items]          
Valuation allowance $ 20,500     $ 24,300 $ 23,300