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Warranties (Tables)
 3 Months Ended
Mar. 31, 2015
Product Warranties Disclosures [Abstract]  
Schedule Of Warranty Liability And Related Activity
Warranty liability and related activity consisted of the following (in thousands):
             
   
Three-Month Periods Ended
  
   
March 31,
  
   
2015
    
2014
  
Beginning balance
   $ 966     $ 934  
Warranty provisions
     44       50  
Warranty claims
     (118 )     (81 )
Adjustments to preexisting warranties
     (24 )     (121 )
Ending balance
   $ 868     $ 782