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Commitments and Contingencies (Tables)
6 Months Ended
Jun. 30, 2014
Commitments And Contingencies Disclosure [Abstract]  
Schedule of Warranty Reserves

Warranty reserves consisted of the following (in thousands):

 

     Three Months Ended     Six Months Ended  
     June 30,     June 30,  
     2014     2013     2014     2013  

Warranty reserves, beginning of period

   $ 3,636      $ 1,575      $ 3,338      $ 1,593   

Warranty reserves accrued

     873        621        1,600        728   

Warranty expenditures

     (480     (257     (909     (382
  

 

 

   

 

 

   

 

 

   

 

 

 

Warranty reserves, end of period

   $ 4,029      $ 1,939      $ 4,029      $ 1,939