Annual report pursuant to Section 13 and 15(d)

Derivative Financial Instruments (Schedule Of Derivative Instruments Fair Value And Balance Sheet Classification) (Details)

v3.8.0.1
Derivative Financial Instruments (Schedule Of Derivative Instruments Fair Value And Balance Sheet Classification) (Details) - Forward exchange contracts [Member] - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Prepaid And Other Current Assets [Member]    
Derivative instruments in asset positions, Forward exchange contracts $ 40 $ 1,165
Other Long-Term Assets [Member]    
Derivative instruments in asset positions, Forward exchange contracts 6 $ 116
Accounts Payable And Accrued Liabilities [Member]    
Derivative instruments in liability positions, Forward exchange contracts 919  
Other Long-Term Liabilities [Member]    
Derivative instruments in liability positions, Forward exchange contracts $ 74