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Miscellaneous Income, Net (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Other Income and Expenses [Abstract]    
Rabbi trust investment income $ 1,067r_Rabbitrustinvestmentincome $ 500r_Rabbitrustinvestmentincome
Insurance proceeds 314us-gaap_ProceedsFromLifeInsurancePolicies 0us-gaap_ProceedsFromLifeInsurancePolicies
Gains on sales of operating property and equipment 183us-gaap_GainLossOnDispositionOfAssets 1,304us-gaap_GainLossOnDispositionOfAssets
Foreign currency translation benefit 129us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax (406)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax
Contract settlement 15us-gaap_GainLossRelatedToLitigationSettlement 2,908us-gaap_GainLossRelatedToLitigationSettlement
Other, net 929us-gaap_NoninterestIncomeOtherOperatingIncome 1,076us-gaap_NoninterestIncomeOtherOperatingIncome
Total $ 2,637us-gaap_OtherNonoperatingIncomeExpense $ 5,382us-gaap_OtherNonoperatingIncomeExpense