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Fair Value of Financial Instruments (Details 1)
3 Months Ended
Mar. 31, 2015
Fair Value Of Financial Instruments Details 1  
Risk free interest rate 0.56%us-gaap_FairValueAssumptionsRiskFreeInterestRate
Stock volatility factor 26.08%us-gaap_FairValueAssumptionsWeightedAverageVolatilityRate
Months to Maturity 1 year 8 months
Expected dividend yield