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Accounts Receivable (Tables)
3 Months Ended
Mar. 31, 2015
Receivables [Abstract]  
Accounts Receivable


     March 31,
2015
     December 31,
2014
 
     (In Thousands)  

Trade receivables

   $ 88,927       $ 86,402   

Other

     2,335         2,498   
  

 

 

    

 

 

 
  91,262      88,900   

Allowance for doubtful accounts

  (860   (826
  

 

 

    

 

 

 
$ 90,402    $ 88,074