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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Details)-K (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Interest Rate Swap [Member]  
Derivative instruments and hedging activities  
Estimated additional amount to be reclassified as an increase to interest expense $ 1.8us-gaap_CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
Interest Rate Swap [Member] | Cash Flow Hedging [Member]  
Derivative instruments and hedging activities  
Gross notional amounts of cash flow hedges 172.0us-gaap_DerivativeLiabilityNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember
Interest Rate Cap [Member] | Cash Flow Hedging [Member]  
Derivative instruments and hedging activities  
Gross notional amounts of cash flow hedges $ 100.0us-gaap_DerivativeLiabilityNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateCapMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember