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Goodwill and Other Intangible Assets (Tables) (Patents [Member])
 12 Months Ended
Dec. 31, 2013
Patents [Member]
  
Schedule of Patent Cost and Other Asset

Patent costs, which are included in other assets in the accompanying balance sheets, as of December 31 were as follows (in thousands):

 

     2013     2012  

Patent costs

    $ 3,170     $ 3,316  

Accumulated amortization

      (2,007 )      (1,984 ) 
  

 

 

    

 

 

  
   $ 1,163     $ 1,332