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Employee Benefit Plans (Other Changes in Plan Assets and Benefit Obligations) (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]  
Current year actuarial loss $ (16,733,000)us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax
Amortization of actuarial loss (2,048,000)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax
Total recognized in other comprehensive loss (18,781,000)us-gaap_DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeLossNetGainLossBeforeTax
Estimated portion of net actuarial loss in accumulated other comprehensive loss $ 3,200,000us-gaap_DefinedBenefitPlanFutureAmortizationOfGainLoss