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Derivative Instruments and Hedging Activities - Additional Information (Details) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Net loss included in accumulated other comprehensive income (loss) to be reclassified into interest expense within the next 12 months $ (2.7)us-gaap_InterestRateCashFlowHedgeGainLossToBeReclassifiedDuringNext12MonthsNet