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Accrued Warranty Costs (Tables)
6 Months Ended
Jun. 30, 2015
Guarantees [Abstract]  
Changes in Product Warranty Obligation (Accrued Warranty Costs)

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

 

     Six Months Ended
June 30,
     Three Months Ended
June 30,
 
     2015      2014      2015      2014  
     (In Thousands)  

Balance at beginning of period

   $ 8,817       $ 7,297       $ 9,034       $ 7,578   

Amounts charged to SG&A

     4,520         3,695         2,421         1,468   

Costs incurred

     (3,741      (3,291      (1,859      (1,345
  

 

 

    

 

 

    

 

 

    

 

 

 

Balance at end of period

   $ 9,596       $ 7,701       $ 9,596       $ 7,701