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Accumulated Other Comprehensive Income (Reclassification Out Of Accumulated Other Comprehensive Income) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Sales $ 61,218 $ 53,267
Less: Income tax expense 297 (42)
Total reclassificaitons from AOCI 257  
Unrealized Gains (Losses) on Cash Flow Hedges [Member]    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Total reclassificaitons from AOCI 257  
Reclassification Out Of Accumulated Other Comprehensive Income [Member]    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Total reclassificaitons from AOCI 257  
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 281 $ (325)
Less: Income tax expense 24  
Total reclassificaitons from AOCI $ 257