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Note C - Inventories (Tables)
9 Months Ended
Sep. 30, 2016
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
(Dollars in thousands)
 
September 30,
2016
   
December 31,
2015
 
Raw materials and in-process
  $ 24,171     $ 25,652  
Finished parts
    41,751       46,270  
Finished products
    8,602       10,896  
Total inventories
  $ 74,524     $ 82,818