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COMMITMENTS AND CONTINGENCIES Purchase Obligation (Details) (Purchase Commitment [Member], USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Purchase Commitment [Member]
   
Unrecorded Unconditional Purchase Obligation [Line Items]    
Total $ 358,290 $ 361,800
Less than 1 year 142,900  
1-3 years 160,954  
3-5 years 54,436  
More than 5 years $ 0