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Accumulated Other Comprehensive Income (Reclassification Out Of Accumulated Other Comprehensive Income) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Sales $ 39,441 $ 39,256 $ 106,790 $ 111,190
Less: Income tax expense 679 49,958 1,020 47,651
Discontinued operations, net of tax   1,107   (430)
Total reclassificaitons from AOCI     (462)  
Unrealized Gains (Losses) on Cash Flow Hedges [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Total reclassificaitons from AOCI     (537)  
Foreign Currency Translation Adjustments [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Total reclassificaitons from AOCI     (126)  
Unrealized gains (losses) on Marketable Securities [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Total reclassificaitons from AOCI     201  
Reclassification Out Of Accumulated Other Comprehensive Income [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Total reclassificaitons from AOCI 18   (462)  
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 (152) 1,530 (495) 4,126
Other, net     (42)  
Discontinued operations, net of tax   $ 76   $ 183
Total reclassificaitons from AOCI (152)   (537)  
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 (31)   (126)  
Reclassification Out Of Accumulated Other Comprehensive Income [Member] | Unrealized gains (losses) on Marketable Securities [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Other, net $ 201   $ 201