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GOODWILL AND OTHER INTANGIBLES - Estimated Future Amortization Expense Related to Intangible Assets (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]    
2021 $ 981  
2022 3,886  
2023 3,618  
2024 2,849  
2025 2,509  
2026 and thereafter 1,201  
Total $ 15,044 $ 15,748