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INCOME TAXES (Details 5) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
INCOME TAXES      
Interest and penalties on income tax $ 0.2us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense $ 0.2us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense $ 0.1us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense
Accrued interest 1.0us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued 0.8us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued  
Accrued penalties $ 0.2us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued $ 0.2us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued