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ASSET RETIREMENT OBLIGATION (Tables)
 12 Months Ended
Dec. 31, 2012
Schedule of Change in Asset Retirement Obligation
(In thousands)             Years Ended December 31,        
                 2012                         2011         

Beginning balance

   $     51,295             $     52,099        

Adjustment due to change in estimate of related costs

       3,570                 (3,174)       

Accretion of liability

       4,920                 5,001        

Liabilities settled

       (2,936)                (2,631)       
   

 

 

      

 

 

  

Ending balance

   $     56,849                 $         51,295