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GOODWILL AND OTHER INTANGIBLES - Goodwill (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Goodwill [Roll Forward]      
Goodwill, Beginning Balance $ 118,649 $ 100,085  
Acquisition 828 18,564  
Goodwill, Ending Balance 119,477 118,649 $ 100,085
Goodwill, Impairment Loss $ 0 $ 0 $ 0