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Goodwill and Other Intangible Assets - Amortization (Details) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Goodwill and Other Intangible Assets      
Amortization of intangible assets $ 332,000 $ 230,000 $ 451,000
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]      
2021 314,000    
2022 298,000    
2023 273,000    
2024 260,000    
2025 237,000    
Thereafter 909,000    
Total remaining amortization expense $ 2,291,000 $ 912,000