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GOODWILL AND OTHER INTANGIBLE ASSETS - Changes in Other Intangible Assets (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Finite-lived Intangible Assets [Roll Forward]        
Beginning of period $ 5,124 $ 6,717 $ 5,458 $ 7,180
Amortization expense (324) (404) (658) (867)
Impairment 0 (153) 0 (153)
Balance, end of period $ 4,800 $ 6,160 $ 4,800 $ 6,160