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OTHER INTANGIBLE ASSETS - Estimated Amortization Expense for Next Five Years (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
OTHER INTANGIBLE ASSETS    
2021 $ 715  
2022 1,878  
2023 1,425  
2024 1,163  
2025 958  
Thereafter 2,938  
Net carrying amount $ 9,077 $ 0