Accrued Liabilities And Other Long Term Liabilities (Schedule Of Long Term Accrued Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Other Current and Noncurrent Assets [Abstract]
Accrued taxes	$ 66,506	$ 18,798
Accrued customer programs	12,956	10,371
Other accrued long-term expenses	16,256	9,768
Total other long-term liabilities	$ 95,718	$ 38,937