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Accrued And Other Liabilities (Schedule Of Other Liabilities) (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Payables and Accruals [Abstract]    
Long term employee indemnity $ 13,976 $ 4,168
Long term tax liability 4,250 8,121
Defined benefit pension obligation 8,367 13,609
Long term deferred revenue 6,959 8,518
Other long term liabilities 8,887 4,915
Total $ 42,439 $ 39,331