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Goodwill and Other Intangible Assets - Amortization (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Goodwill and Other Intangible Assets        
Amortization of intangible assets $ 79,000 $ 83,000 $ 157,000 $ 166,000