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GOODWILL AND OTHER INTANGIBLE ASSETS - Amortization expense (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Future estimated amortization expense related to amortizing intangibles    
2021 $ 4,426  
2022 4,405  
2023 1,111  
2024 13  
2025 13  
2026 and thereafter 106  
Amortizing intangibles, net $ 10,074 $ 17,821