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COMMITMENTS AND CONTINGENCIES Purchase Obligation (Details) (Purchase Commitment [Member], USD $)
In Thousands, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Purchase Commitment [Member]
   
Unrecorded Unconditional Purchase Obligation [Line Items]    
Total $ 361,772 $ 420,100
Less Than 1 Year 147,310  
1 to 3 Years 176,663  
3 To 5 Years 37,799  
More Than 5 Years $ 0