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LONG-TERM DEBT AND FINANCING ARRANGEMENTS (Details 3) (USD $) | 12 Months Ended | 0 Months Ended |
--- | --- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Nov. 05, 2014 | Jun. 15, 2012 | Jan. 02, 2015 | Feb. 01, 2015
Financing Arrangements |  |  |  |  |  |  |
Interest paid, net of capitalized interest | $ 2,700,000 us-gaap_InterestPaidNet | $ 3,600,000 us-gaap_InterestPaidNet | $ 4,500,000 us-gaap_InterestPaidNet |  |  |  |
Capitalized interest | 100,000 us-gaap_InterestPaidCapitalized | 100,000 us-gaap_InterestPaidCapitalized |  |  |  |  |
Amounts collateralized by restricted funds | 1,386,000 us-gaap_RestrictedCashAndInvestmentsCurrent | 1,902,000 us-gaap_RestrictedCashAndInvestmentsCurrent |  |  |  |  |
Maximum |  |  |  |  |  |  |
Financing Arrangements |  |  |  |  |  |  |
Capitalized interest |  |  | 100,000 us-gaap_InterestPaidCapitalized / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |  |
Interest rate swap agreement |  |  |  |  |  |  |
Financing Arrangements |  |  |  |  |  |  |
Term of swap agreement |  |  |  | 5 years |  |  |
Notional amount | 50,000,000 invest_DerivativeNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateSwapMember |  |  |  |  |  |
Fixed interest rate payments (as a percent) | 1.85%us-gaap_DerivativeFixedInterestRate / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateSwapMember |  |  |  |  |  |
Fair value included in other long-term liabilities | 600,000 us-gaap_DerivativeLiabilities / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateSwapMember |  |  |  |  |  |
Interest rate swap agreement | LIBOR |  |  |  |  |  |  |
Financing Arrangements |  |  |  |  |  |  |
Period of reference rate for variable rate receivable | 1 month |  |  |  |  |  |
Term Loan |  |  |  |  |  |  |
Financing Arrangements |  |  |  |  |  |  |
Face amount of term loan |  |  |  |  | 100,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_LongtermDebtTypeAxis = us-gaap_SecuredDebtMember |  |
Letter of Credit Agreements |  |  |  |  |  |  |
Financing Arrangements |  |  |  |  |  |  |
Outstanding letters of credit | 22,100,000 us-gaap_LettersOfCreditOutstandingAmount / us-gaap_LongtermDebtTypeAxis = arcb_LettersOfCreditAgreementsMember | 22,800,000 us-gaap_LettersOfCreditOutstandingAmount / us-gaap_LongtermDebtTypeAxis = arcb_LettersOfCreditAgreementsMember |  |  |  |  |
Amounts collateralized by restricted funds | 1,400,000 us-gaap_RestrictedCashAndInvestmentsCurrent / us-gaap_LongtermDebtTypeAxis = arcb_LettersOfCreditAgreementsMember | 1,900,000 us-gaap_RestrictedCashAndInvestmentsCurrent / us-gaap_LongtermDebtTypeAxis = arcb_LettersOfCreditAgreementsMember |  |  |  |  |
Surety bonds |  |  |  |  |  |  |
Financing Arrangements |  |  |  |  |  |  |
Amounts collateralized by restricted funds |  | 3,800,000 us-gaap_RestrictedCashAndInvestmentsCurrent / us-gaap_LongtermDebtTypeAxis = us-gaap_SuretyBondMember |  |  |  |  |
Outstanding surety bonds under uncollateralized bond programs | 43,800,000 arcb_SuretyBondsAmountOutstandingUnderUncollateralizedProgram / us-gaap_LongtermDebtTypeAxis = us-gaap_SuretyBondMember | 43,800,000 arcb_SuretyBondsAmountOutstandingUnderUncollateralizedProgram / us-gaap_LongtermDebtTypeAxis = us-gaap_SuretyBondMember |  |  |  |  |
Outstanding surety bonds under collateralized bond program |  | 12,700,000 arcb_SuretyBondAmountsOutstandingUnderCollateralizedProgram / us-gaap_LongtermDebtTypeAxis = us-gaap_SuretyBondMember |  |  |  |  |
Notes payable | Revenue equipment | Freight Transportation (ABF Freight) |  |  |  |  |  |  |
Financing Arrangements |  |  |  |  |  |  |
Equipment financed during the period under notes payable | 55,300,000 us-gaap_ProceedsFromIssuanceOfDebt / us-gaap_LongtermDebtTypeAxis = us-gaap_NotesPayableOtherPayablesMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_VehiclesMember / us-gaap_StatementBusinessSegmentsAxis = arcb_FreightTransportationMember |  | 38,000,000 us-gaap_ProceedsFromIssuanceOfDebt / us-gaap_LongtermDebtTypeAxis = us-gaap_NotesPayableOtherPayablesMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_VehiclesMember / us-gaap_StatementBusinessSegmentsAxis = arcb_FreightTransportationMember |  |  |  |
Capital lease obligations | Maximum |  |  |  |  |  |  |
Financing Arrangements |  |  |  |  |  |  |
Newly entered capital leases |  | 100,000 us-gaap_CapitalLeaseObligationsIncurred / us-gaap_LongtermDebtTypeAxis = us-gaap_CapitalLeaseObligationsMember / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |  |  |
Credit Agreement | Term Loan |  |  |  |  |  |  |
Financing Arrangements |  |  |  |  |  |  |
Debt instrument, term |  |  |  |  | 5 years |  |
Face amount of term loan |  |  |  |  | 100,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = arcb_CreditAgreementMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SecuredDebtMember |  |
Credit Agreement | Credit Facility |  |  |  |  |  |  |
Financing Arrangements |  |  |  |  |  |  |
Maximum borrowing capacity | 75,000,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_DebtInstrumentAxis = arcb_CreditAgreementMember / us-gaap_LongtermDebtTypeAxis = us-gaap_RevolvingCreditFacilityMember |  |  |  |  |  |
Amount outstanding | 0 us-gaap_LineOfCredit / us-gaap_DebtInstrumentAxis = arcb_CreditAgreementMember / us-gaap_LongtermDebtTypeAxis = us-gaap_RevolvingCreditFacilityMember |  |  |  | 0 us-gaap_LineOfCredit / us-gaap_DebtInstrumentAxis = arcb_CreditAgreementMember / us-gaap_LongtermDebtTypeAxis = us-gaap_RevolvingCreditFacilityMember |  |
Amended and Restated Credit Agreement | Interest rate swap agreement |  |  |  |  |  |  |
Financing Arrangements |  |  |  |  |  |  |
Amount of borrowings covered by the interest rate swap | 50,000,000 us-gaap_DerivativeAmountOfHedgedItem / us-gaap_DebtInstrumentAxis = arcb_AmendedAndRestatedCreditAgreementMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateSwapMember |  |  |  |  |  |
Amended and Restated Credit Agreement | Subsequent Event |  |  |  |  |  |  |
Financing Arrangements |  |  |  |  |  |  |
Term loan balance refinanced with revolving credit facility |  |  |  |  |  | 70,000,000 arcb_TermLoanRefinancedWithRevolvingCreditFacility / us-gaap_DebtInstrumentAxis = arcb_AmendedAndRestatedCreditAgreementMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |
Additional borrowing capacity that may be requested |  |  |  |  |  | 75,000,000 arcb_LineOfCreditFacilityAdditionalBorrowingCapacity / us-gaap_DebtInstrumentAxis = arcb_AmendedAndRestatedCreditAgreementMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |
Amended and Restated Credit Agreement | Credit Facility | Subsequent Event |  |  |  |  |  |  |
Financing Arrangements |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  | 150,000,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_DebtInstrumentAxis = arcb_AmendedAndRestatedCreditAgreementMember / us-gaap_LongtermDebtTypeAxis = us-gaap_RevolvingCreditFacilityMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |
Amended and Restated Credit Agreement | Letter of Credit Agreements | Subsequent Event |  |  |  |  |  |  |
Financing Arrangements |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  | 20,000,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_DebtInstrumentAxis = arcb_AmendedAndRestatedCreditAgreementMember / us-gaap_LongtermDebtTypeAxis = arcb_LettersOfCreditAgreementsMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |
Accounts receivable securitization program |  |  |  |  |  |  |
Financing Arrangements |  |  |  |  |  |  |
Maximum borrowing capacity | 75,000,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_DebtInstrumentAxis = arcb_AccountsReceivableSecuritizationProgramMember |  |  |  |  |  |
Amount outstanding | 0 us-gaap_LineOfCredit / us-gaap_DebtInstrumentAxis = arcb_AccountsReceivableSecuritizationProgramMember |  |  |  |  |  |
Remaining borrowing capacity | 54,900,000 us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity / us-gaap_DebtInstrumentAxis = arcb_AccountsReceivableSecuritizationProgramMember |  |  |  |  |  |
Accounts receivable securitization program | Subsequent Event |  |  |  |  |  |  |
Financing Arrangements |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  | 100,000,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_DebtInstrumentAxis = arcb_AccountsReceivableSecuritizationProgramMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
Increase in cash proceeds available |  |  |  |  |  |  | 25,000,000 arcb_LineOfCreditFacilityIncreaseInBorrowingCapacity / us-gaap_DebtInstrumentAxis = arcb_AccountsReceivableSecuritizationProgramMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
Accounts receivable securitization program | Letter of Credit Agreements |  |  |  |  |  |  |
Financing Arrangements |  |  |  |  |  |  |
Outstanding letters of credit | $ 20,100,000 us-gaap_LettersOfCreditOutstandingAmount / us-gaap_DebtInstrumentAxis = arcb_AccountsReceivableSecuritizationProgramMember / us-gaap_LongtermDebtTypeAxis = arcb_LettersOfCreditAgreementsMember | $ 20,300,000 us-gaap_LettersOfCreditOutstandingAmount / us-gaap_DebtInstrumentAxis = arcb_AccountsReceivableSecuritizationProgramMember / us-gaap_LongtermDebtTypeAxis = arcb_LettersOfCreditAgreementsMember |  |  |  |  |

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- Definition The period of the reference rate used to calculate the variable rate receivable on the interest rate derivative, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition The amount of an outstanding term loan refinanced with a revolving credit facility under an amendment to the debt agreement. + References No definition available. + Details
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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13433-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13495-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=34720828&loc=SL20225862-175312 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41271-113958 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=36459792&loc=SL20226008-175313 + Details
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- Definition The amount of cash paid during the current period for interest that is capitalized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4297-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585 + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt. + References No definition available. + Details
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- Definition The current cash, cash equivalents and investments that are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against short-term borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. Includes current cash equivalents and investments that are similarly restricted as to withdrawal, usage or disposal. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 1 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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