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GOODWILL AND OTHER INTANGIBLE ASSETS - Changes in Other Intangible Assets (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Finite-lived Intangible Assets [Roll Forward]    
Beginning of period $ 5,458 $ 7,180
Amortization expense (334) (463)
Balance, end of period $ 5,124 $ 6,717