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Employee Benefit Plans - Schedule of Assumptions Used to Determine Benefit Obligation (Details)
Dec. 31, 2014
Dec. 31, 2013
Compensation and Retirement Disclosure [Abstract]    
Discount rate 4.38%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate 5.26%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate