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Inventories
12 Months Ended
Dec. 31, 2011
Inventory Disclosure [Abstract]  
Inventories
2.
 Inventories
 
   
December 31,
 
   
2011
   
2010
 
   
($000s omitted)
 
 
Raw materials and common parts
  $ 5,727     $ 5,491  
Work-in-process
    3,511       3,358  
Finished goods
    2,369       2,183  
                 
Total inventories, net of reserve
  $ 11,607     $ 11,032