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Pension And Other Liabilities (Schedule Of Pension Benefit Obligation Recognized In Balance Sheets) (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Pension And Other Liabilities [Abstract]    
Current liabilities $ 2,907 $ 2,223
Other liabilities - Non current 5,228 5,732
Total pension liability $ 8,135 $ 7,955