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Miscellaneous Income, Net (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Other Income and Expenses [Abstract]      
Contract settlement $ 3,014us-gaap_GainLossRelatedToLitigationSettlement $ 0us-gaap_GainLossRelatedToLitigationSettlement $ 0us-gaap_GainLossRelatedToLitigationSettlement
Gains on sales of operating property and equipment 2,909us-gaap_GainLossOnDispositionOfAssets 1,020us-gaap_GainLossOnDispositionOfAssets 4,456us-gaap_GainLossOnDispositionOfAssets
Business interruption insurance recoveries 808us-gaap_GainOnBusinessInterruptionInsuranceRecovery 2,743us-gaap_GainOnBusinessInterruptionInsuranceRecovery 1,991us-gaap_GainOnBusinessInterruptionInsuranceRecovery
Foreign currency translation benefit 0r_CurrencyTranslationBenefit 1,904r_CurrencyTranslationBenefit 0r_CurrencyTranslationBenefit
Rabbi trust investment (expense) income 2,726r_Rabbitrustinvestmentincome 4,475r_Rabbitrustinvestmentincome 1,497r_Rabbitrustinvestmentincome
Other, net 4,156us-gaap_NoninterestIncomeOtherOperatingIncome 5,230us-gaap_NoninterestIncomeOtherOperatingIncome 3,783us-gaap_NoninterestIncomeOtherOperatingIncome
Total $ 13,613us-gaap_OtherNonoperatingIncomeExpense $ 15,372us-gaap_OtherNonoperatingIncomeExpense $ 11,727us-gaap_OtherNonoperatingIncomeExpense