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COMMITMENTS AND CONTINGENCIES Purchase Obligation (Details) (Purchase Commitment [Member], USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Purchase Commitment [Member]
   
Unrecorded Unconditional Purchase Obligation [Line Items]    
Total $ 354,619 $ 361,800
Less Than 1 Year 138,142  
1 to 3 Years 173,872  
3 To 5 Years 42,605  
More Than 5 Years $ 0