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GOODWILL AND OTHER INTANGIBLE ASSETS - Changes in Goodwill (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Goodwill [Roll Forward]    
Balance, beginning of year $ 18,724 $ 19,925
Adjustments to acquired goodwill 0 (1,201)
Balance, end of period $ 18,724 $ 18,724