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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 4) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Changes in the carrying amount of goodwill      
Balance at the beginning of the period $ 27.0 $ 27.0  
Balance at the end of the period 27.0 27.0 27.0
Intangible assets      
Gross Carrying Amount 15.6 15.6  
Impairment on long lived intangible assets (2.1)    
Accumulated Amortization (9.6) (8.9)  
Aggregate intangible asset amortization 0.7 0.9 1.3
Estimated amortization expenses related to intangibles      
2013 0.7    
2014 0.7    
2015 0.7    
2016 0.7    
2017 0.7    
Thereafter 0.4    
Total 3.9    
Customer lists
      
Intangible assets      
Gross Carrying Amount 11.8 11.8  
Impairment on long lived intangible assets (2.1)    
Accumulated Amortization (6.2) (5.6)  
Other
      
Intangible assets      
Gross Carrying Amount 3.8 3.8  
Accumulated Amortization $ (3.4) $ (3.3)