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Accrued And Other Liabilities (Schedule Of Other Liabilities) (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Accrued And Other Liabilities [Abstract]    
Long term employee indemnity $ 12,776 $ 11,152
Arbitration award 11,282 11,282
Defined benefit pension obligation 8,276 7,613
Long term tax liability 7,213 7,183
Other long term liabilities 5,691 5,726
Long term deferred revenue 6,713 7,464
Long term earnouts related to acquisitions 4,117 7,568
Total $ 56,068 $ 57,988