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Employee Benefit Plans (Future Benefit Payments) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]  
2015 $ 6,263us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths
2016 6,614us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo
2017 6,877us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree
2018 7,115us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour
2019 7,263us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive
2020 - 2024 $ 38,265us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter