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RELATED PARTY TRANSACTIONS (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Related Party Transactions [Abstract]      
Related Party Transaction, Revenues from Transactions with Related Party $ 2.6 $ 1.9 $ 1.0
Related Party Transaction, Due from (to) Related Party 0 0.4  
Related Party Transaction, Expenses from Transactions with Related Party $ 2.3 $ 1.6 $ 1.3