Accrued and Other Liabilities (Schedule Of Other Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Payables and Accruals [Abstract]
Long term employee indemnity	$ 14,408	$ 13,609
Long term tax liability	5,011	4,168
Defined benefit pension obligation	10,357	8,518
Long term deferred revenue	7,370	8,121
Other long term liabilities	8,662	4,915
Total	$ 45,808	$ 39,331