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Significant Stock-Based Plan Activity and Stock-Based Compensation (Tables)
 9 Months Ended
Sep. 30, 2013
Significant Stock-Based Plan Activity and Stock-Based Compensation [Abstract]  
Stock-based compensation expense
Total stock-based compensation expense, recognized as a component of Selling, general and administrative expense on our Consolidated Statements of Operations, was as follows (in thousands):

 
 
Three Months Ended September 30,
  
Nine Months Ended September 30,
 
 
 
2013
  
2012
  
2013
  
2012
 
Stock-based compensation expense
 
$
284
  
$
218
  
$
632
  
$
529