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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Components of accumulated other comprehensive loss:    
Accumulated net unrealized (gain) loss on available-for-sale securities $ 84 $ 194
Foreign currency translation adjustments, net of tax 2,950 (32,581)
Total accumulated other comprehensive income (loss) $ 3,034 $ (32,387)