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GOODWILL AND OTHER INTANGIBLE ASSETS - Changes in Goodwill (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Goodwill [Roll Forward]    
Balance, beginning of year $ 18,724 $ 19,925
Adjustments to acquired goodwill 0 217
Balance, end of period $ 18,724 $ 20,142