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Employee Benefit Plans (Tables)
 12 Months Ended
Dec. 31, 2013
Employee Benefit Plans  
Schedule of classification of liabilities in consolidated balance sheets

 

 
   Year Ended
December 31,		  
 
   2013   2012  
 
   (in thousands)
  

Current:

              

Accrued compensation

   $ 638   $ 1,475  
           
​ ​ ​ ​ ​ ​ ​ ​

Total current liabilities

   $ 638   $ 1,475  

Long-term:

    
 		    
 		  

Other long-term liabilities

   $ 3,416   $ 3,042  
           
​ ​ ​ ​ ​ ​ ​ ​

Total liabilities

   $ 4,054   $ 4,517  
           
​ ​ ​ ​ ​ ​ ​ ​
​ ​ ​ ​ ​ ​ ​ ​