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FAIR VALUE MEASUREMENTS (Details 3) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Long-term Debt, Fair Value $ 684.9us-gaap_LongTermDebtFairValue $ 714.4us-gaap_LongTermDebtFairValue
Notes payable 675.1us-gaap_NotesPayable 691.0us-gaap_NotesPayable
Fair Value, Inputs, Level 1    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Long-term Debt, Fair Value 0us-gaap_LongTermDebtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member		 0us-gaap_LongTermDebtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
Fair Value, Inputs, Level 2    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Long-term Debt, Fair Value 531.9us-gaap_LongTermDebtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member		 561.4us-gaap_LongTermDebtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
Fair Value, Inputs, Level 3    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Long-term Debt, Fair Value $ 153.0us-gaap_LongTermDebtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member		 $ 153.0us-gaap_LongTermDebtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member