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INCOME TAXES - Unrecognized Tax Benefits (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
INCOME TAXES    
Balance as of January 1 $ 2,299 $ 4,733
Additions for tax positions related to current years 0 0
Additions (deductions) for tax positions related to prior years 8 (2,434)
Deductions for tax positions as a result of tax settlements (992) 0
Balance as of December 31 $ 1,315 $ 2,299