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Goodwill and Other Intangible Assets (Estimated Annual Amortization Expense) (Details)
$ in Thousands
Dec. 31, 2018
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]  
2019 $ 1,530
2020 1,499
2021 1,450
2022 1,449
2023 $ 1,349