Derivative Financial Instruments (Schedule Of Derivative Instruments Fair Value And Balance Sheet Classification) (Details) - Forward exchange contracts [Member] - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Prepaid And Other Current Assets [Member]
Derivative instruments in asset positions, Forward exchange contracts	$ 1,165	$ 893
Other Long-Term Assets [Member]
Derivative instruments in asset positions, Forward exchange contracts	$ 116	12
Other Long-Term Liabilities [Member]
Derivative instruments in liability positions, Forward exchange contracts		$ 25