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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, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Sales $ 30,014 $ 46,994 $ 83,569 $ 108,212
Less: Income tax expense (1,145) (679) (1,131) (382)
Total reclassificaitons from AOCI 223 170 442 427
Unrealized Gains (Losses) on Cash Flow Hedges [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Total reclassificaitons from AOCI 223 170 442 427
Reclassification Out Of Accumulated Other Comprehensive Income [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Total reclassificaitons from AOCI 223 170 442 427
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 294 302 582 583
Less: Income tax expense 71 132 140 156
Total reclassificaitons from AOCI $ 223 $ 170 $ 442 $ 427