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Employee Benefit Plans - Schedule of Assumptions Used to Determine Net Periodic Costs (Details)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Compensation and Retirement Disclosure [Abstract]    
Discount rate 5.26%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate 4.53%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate
Expected return on plan assets 7.40%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets 7.40%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets