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COMMITMENTS AND CONTINGENCIES (Tables)
6 Months Ended
Jun. 30, 2011
Other Commitments

Other commitments as of June 30, 2011 were as follows (in thousands):

 

     Commitments Expiring by Period  
     Total      Less Than
One Year
     More Than
One Year
 

Letters of credit

   $ 281,091       $ 3,208       $ 277,883   

Surety bonds

     85,876         —           85,876   
                          

Total other commitments — net

   $ 366,967       $ 3,208       $ 363,759