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Accrued Warranty Costs (Tables)
9 Months Ended
Sep. 30, 2014
Guarantees [Abstract]  
Changes in Product Warranty Obligation (Accrued Warranty Costs)

Changes in our product warranty obligation (accrued warranty costs) are as follows:

 

     Nine Months Ended     Three Months Ended  
     September 30,     September 30,  
     2014     2013     2014     2013  
     (In Thousands)  

Balance at beginning of period

   $ 7,297      $ 6,172      $ 7,701      $ 6,944   

Amounts charged to costs and expenses

     5,621        5,860        1,926        1,849   

Costs incurred

     (4,749     (4,820     (1,458     (1,581
  

 

 

   

 

 

   

 

 

   

 

 

 

Balance at end of period

   $ 8,169      $ 7,212      $ 8,169      $ 7,212