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INCOME TAXES (Unrecognized Tax Benefits) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Unrecognized Tax Benefits [Roll Forward]      
Unrecognized tax benefits beginning balance $ 22,372 $ 14,363 $ 1,843
Increase for current year tax positions 3,487 9,561 12,620
Decrease for prior period tax positions   (70) (34)
Increase for prior year tax positions 440    
Expiration of the statute of limitation for assessment of taxes (832) (1,482) (66)
Unrecognized tax benefits ending balance 25,467 22,372 14,363
Unrecognized tax benefits that would favorably affect the annual effective tax rate if recognized in future periods 25,000 22,000  
Interest and penalties on income taxes recognized 200 200  
Interest and penalties on income taxes reversal     100
Interest and penalties accrued on income taxes 600 $ 400 $ 200
State and Local Jurisdiction      
Unrecognized Tax Benefits [Roll Forward]      
Increase for current year tax positions 4,000    
Expiration of the statute of limitation for assessment of taxes $ (1,000)