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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified | 3 Months Ended
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Mar. 31, 2015 | Mar. 31, 2014
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME |  |
NET INCOME (LOSS) | $ 745 us-gaap_NetIncomeLoss | $ (5,193)us-gaap_NetIncomeLoss
Pension and other postretirement benefit plans: |  |
Net actuarial loss, net of tax of: (2015 - $1,166; 2014 - $3,372) | (1,831)us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax | (5,296)us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax
Pension settlement expense, net of tax of: (2015 - $435; 2014 - $1,436) | 684 arcb_OtherComprehensiveIncomeLossFinalizationOfPensionAndNonPensionPostretirementPlanValuationSettlementsNetOfTax | 2,255 arcb_OtherComprehensiveIncomeLossFinalizationOfPensionAndNonPensionPostretirementPlanValuationSettlementsNetOfTax
Amortization of unrecognized net periodic benefit costs, net of tax of: (2015 - $400; 2014 - $206): |  |
Net actuarial loss | 656 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax | 353 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax
Prior service credit | (29)us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax | (29)us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax
Interest rate swap and foreign currency translation: |  |
Change in unrealized loss on interest rate swap, net of tax of: (2015 - $235) | (364)us-gaap_OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent |
Change in foreign currency translation, net of tax of: (2015 - $187; 2014 - $24) | (295)us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent | (37)us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent
OTHER COMPREHENSIVE LOSS, net of tax | (1,179)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent | (2,754)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
TOTAL COMPREHENSIVE LOSS | $ (434)us-gaap_ComprehensiveIncomeNetOfTax | $ (7,947)us-gaap_ComprehensiveIncomeNetOfTax

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