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Segment Reporting (Tables)
6 Months Ended
Jun. 30, 2013
Segment Reporting [Abstract]  
Net sales between residential, industrial/commercial and other products
The breakout of net sales between residential, commercial & industrial, and other products is as follows:
 
   
Three Months Ended June 30,
  
Six Months Ended June 30,
 
   
2013
  
2012
  
2013
  
2012
 
              
Residential power products
 $196,616  $123,399  $451,860  $298,476 
Commercial & industrial power products
  133,427   101,101   260,507   206,114 
Other
  16,645   14,637   33,893   29,108 
   Total
 $346,688  $239,137  $746,260  $533,698