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Note B - Inventories (Tables)
6 Months Ended
Jun. 30, 2013
Inventory Disclosure [Text Block]  
Schedule of Inventory, Current [Table Text Block]

(Thousands of dollars)

 

June 30,

2013

   

December 31, 2012

 

Raw materials and in-process

  $ 21,796     $ 23,967  

Finished parts

    47,211       52,607  

Finished products

    15,682       14,324  

Total inventories

  $ 84,689     $ 90,898