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Accumulated Other Comprehensive Income (Reclassification Out Of Accumulated Other Comprehensive Income) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Sales $ 53,555 $ 61,218
Less: Income tax expense 14 297
Total reclassificaitons from AOCI 219 257
Unrealized Gains (Losses) on Cash Flow Hedges [Member]    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Total reclassificaitons from AOCI 219 257
Reclassification Out Of Accumulated Other Comprehensive Income [Member]    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Total reclassificaitons from AOCI 219 257
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 288 281
Less: Income tax expense 69 24
Total reclassificaitons from AOCI $ 219 $ 257