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BORROWINGS (Schedule of Bank Borrowings) (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
BORROWINGS    
Short-term bank borrowings $ 0 $ 15,317
Long-term bank borrowings, current portion 0 55,114
Total borrowings, current 0 70,431
Long-term bank borrowings, non-current portion 0 123,222
Total $ 0 $ 193,653