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Accrued And Other Liabilities (Schedule Of Other Liabilities) (Details) - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Accrued And Other Liabilities [Abstract]    
Long term employee indemnity $ 13,646 $ 11,152
Arbitration award   11,282
Defined benefit pension obligation 8,576 7,613
Other long term liabilities 7,775 5,726
Long term tax liability 7,124 7,183
Long term deferred revenue 7,062 7,464
Long term earnouts related to acquisitions 4,346 7,568
Total $ 48,529 $ 57,988