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Discontinued Operations (Tables)
12 Months Ended
Dec. 31, 2011
Discontinued Operations [Abstract]  
Selected financial information for discontinued operations
   The following table details selected financial information for the discontinued operations in the consolidated statements of operations for fiscal years ended December 31, 2009. There were no discontinued operations in the fiscal years ended December 31, 2011 and December 31. 2010.  The amounts exclude general corporate overhead and interest expense which were previously allocated to the entities comprising discontinued operations.

Thousands of Dollars
 
2009
     
           
Net sales                                                                               
$
15,600
     
           
Production margin                                                                               
 
1,148
     
           
Expenses                                                                               
 
582
     
Impairment of assets                                                                               
 
5,778
     
Restructuring and other costs                                                                               
 
--
     
Gain on sale of assets                                                                               
 
239
     
           
Income (loss) from operations                                                                               
$
(4,973)
     
           
Other income                                                                               
 
--
     
           
Foreign currency translation
         
 
loss from liquidation of investment
 
--
     
           
Provision (benefit) for taxes on income                                                                               
 
(1,822)
     
           
Income (loss) from discontinued operations, net of tax
$
(3,151)