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Pension And Other Liabilities (Schedule Of Pension Benefit Obligation Recognized In Balance Sheets) (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Pension And Other Liabilities [Abstract] |  |
Current liabilities | $ 684 | $ 684
Other liabilities - Non current | 4,048 | 4,469
Total pension liability | $ 4,732 | $ 5,153

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