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Accrued And Other Liabilities (Schedule Of Other Liabilities) (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Accrued And Other Liabilities [Abstract]    
Arbitration award $ 11,282 $ 11,282
Long term employee indemnity 11,974 11,152
Defined benefit pension obligation 7,742 7,613
Long term tax liability 7,190 7,183
Long term earnouts related to acquisitions 3,897 7,568
Long term deferred revenue 7,019 7,464
Other long term liabilities 5,759 5,726
Total $ 54,863 $ 57,988