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Intangible Assets (Schedule Of Estimated Future Amortization Expenses) (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Intangible Assets [Abstract]    
2020 $ 1,609  
2021 1,609  
2022 664  
2023 474  
2024 169  
Net Carrying Amount $ 4,525 $ 5,733