Annual report pursuant to Section 13 and 15(d)

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

v3.7.0.1
Accumulated Other Comprehensive Income (Reclassification Out Of Accumulated Other Comprehensive Income) (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                      
Sales $ 41,399 $ 39,441 $ 29,142 $ 38,207 $ 44,076 $ 39,256 $ 30,053 $ 41,881 $ 148,189 $ 155,266 $ 158,303
Less: Income tax expense                 665 47,692 (3,818)
Discontinued operations, net of tax         $ 10,994 $ 1,107 $ (1,607) $ 70   10,564 $ 23,625
Total reclassificaitons from AOCI                 455    
Unrealized Gains (Losses) on Cash Flow Hedges [Member]                      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                      
Total reclassificaitons from AOCI                 393    
Foreign Currency Translation Adjustments [Member]                      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                      
Total reclassificaitons from AOCI                 263    
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]                      
Sales                 (351) 5,787  
Discontinued operations, net of tax                 0 $ 297  
Total reclassificaitons from AOCI                 (455)    
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                 (351)    
Other, net                 (42)    
Total reclassificaitons from AOCI                 393    
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                 (263)    
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