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INCOME TAXES (Schedule of Effect of Tax Holidays) (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
INCOME TAXES      
The aggregate dollar effect $ 5.2 $ 7.8 $ 11.3
Per share effect-basic and diluted $ 0.02 $ 0.02 $ 0.04