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Fair Value Measurements (Tables)
6 Months Ended
Jun. 30, 2013
Fair Value Measurements [Abstract]  
Changes in fair value of pension withdrawal liability
The following table summarizes the changes in the fair value of the Company’s multiemployer pension withdrawal liability during the first six months of 2013:
 
   
Fair Value
  
      
Liability balance at January 1, 2013
 $31,683  
Accretion of present value discount
  209  
       
Liability balance at March 31, 2013
  31,892  
Accretion of present value discount
  208  
       
Liability balance at June 30, 2013
 $32,100  
Fair value of long term liabilities
The following table summarizes the fair values as of June 30, 2013:
 
   
Level 1
  
Level 2
  
Level 3
  
Total
  
Other long-term liabilities:
             
Multiemployer pension withdrawal liability
 $--  $--  $32,100  $32,100