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Pension And Other Liabilities (Schedule Of Change In Pension Benefit Obligation And Funded Status) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Pension And Other Liabilities [Abstract]    
Benefit obligation at beginning of period $ 7,955 $ 7,775
Interest cost 180 180
Actuarial gain
Benefit obligation at end of period 8,135 7,955
Funded status at end of period $ (8,135) $ (7,955)