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COMMITMENTS AND CONTINGENCIES Commitments and Contingencies - Additional Information (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Commitments and Contingencies Disclosure [Abstract]      
Rental expense $ 19.8 $ 16.2 $ 17.3