Quarterly report pursuant to Section 13 or 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
Mar. 31, 2018
Dec. 31, 2017
Prepaid And Other Current Assets [Member]    
Derivative instruments in asset positions, Forward exchange contracts $ 229 $ 40
Other Long-Term Assets [Member]    
Derivative instruments in asset positions, Forward exchange contracts   6
Accounts Payable And Accrued Liabilities [Member]    
Derivative instruments in liability positions, Forward exchange contracts $ 926 919
Other Long-Term Liabilities [Member]    
Derivative instruments in liability positions, Forward exchange contracts   $ 74