Quarterly report pursuant to Section 13 or 15(d)

Accumulated Other Comprehensive Income (Components Of Accumulated Other Comprehensive Income) (Details)

v3.8.0.1
Accumulated Other Comprehensive Income (Components Of Accumulated Other Comprehensive Income) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Balance as of December 31, 2017 $ 499  
Other comprehensive income (loss) before reclassifications 579  
Amounts reclassified from other comprehensive income (loss) 135  
Net current period other comprehensive income (loss) 714 $ (63)
Balance as of March 31, 2018 1,213  
Foreign Currency Translation Adjustments [Member]    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Balance as of December 31, 2017 905  
Other comprehensive income (loss) before reclassifications 756  
Amounts reclassified from other comprehensive income (loss) (131)  
Net current period other comprehensive income (loss) 625  
Balance as of March 31, 2018 1,530  
Unrealized Gains (Losses) on Cash Flow Hedges [Member]    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Balance as of December 31, 2017 (406)  
Other comprehensive income (loss) before reclassifications (177)  
Amounts reclassified from other comprehensive income (loss) 266  
Net current period other comprehensive income (loss) 89  
Balance as of March 31, 2018 $ (317)