Quarterly report pursuant to Section 13 or 15(d)

Accumulated Other Comprehensive Income (Reclassification Out Of Accumulated Other Comprehensive Income) (Details)

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Accumulated Other Comprehensive Income (Reclassification Out Of Accumulated Other Comprehensive Income) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Sales $ 45,881 $ 30,680 $ 99,148 $ 72,236
Less: Income tax expense (1) 104 (43) 314
Total reclassificaitons from AOCI     (62)  
Unrealized Gains (Losses) on Cash Flow Hedges [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Total reclassificaitons from AOCI     (21)  
Foreign Currency Translation Adjustments [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Total reclassificaitons from AOCI     (41)  
Reclassification Out Of Accumulated Other Comprehensive Income [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Total reclassificaitons from AOCI 73   (62)  
Reclassification Out Of Accumulated Other Comprehensive Income [Member] | Unrealized Gains (Losses) on Cash Flow Hedges [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Sales (5) $ 90 (330) $ 386
Less: Income tax expense (250)   (309)  
Total reclassificaitons from AOCI 245   (21)  
Reclassification Out Of Accumulated Other Comprehensive Income [Member] | Foreign Currency Translation Adjustments [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Other, net $ (172)   $ (41)