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Accrued And Other Liabilities (Schedule Of Other Liabilities) (Details) - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Payables and Accruals [Abstract]    
Long term employee indemnity $ 13,694 $ 13,887
Long term tax liability 9,349 9,340
Defined benefit pension obligation 8,055 8,290
Long term deferred revenue 7,833 7,298
Other long term liabilities 7,467 7,596
Long term earnouts related to acquisitions 0 2,343
Total $ 46,398 $ 48,754