XML 93 R58.htm IDEA: XBRL DOCUMENT
v2.4.1.9

INCOME TAXES (Details 5) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Income taxes |  |  |
Reserve for uncertain tax positions | $ 0.7 us-gaap_UnrecognizedTaxBenefits | $ 0.3 us-gaap_UnrecognizedTaxBenefits | $ 0 us-gaap_UnrecognizedTaxBenefits
Federal, State, and Local Jurisdiction |  |  |
Other tax disclosures |  |  |
Interest paid on income tax obligations | 0 arcb_IncomeTaxInterestPaid / us-gaap_IncomeTaxAuthorityAxis = arcb_DomesticStateAndLocalJurisdictionMember |  |
Federal, State, and Local Jurisdiction | Maximum |  |  |
Other tax disclosures |  |  |
Interest paid on income tax obligations |  | 0.1 arcb_IncomeTaxInterestPaid / us-gaap_IncomeTaxAuthorityAxis = arcb_DomesticStateAndLocalJurisdictionMember / us-gaap_RangeAxis = us-gaap_MaximumMember | 0.1 arcb_IncomeTaxInterestPaid / us-gaap_IncomeTaxAuthorityAxis = arcb_DomesticStateAndLocalJurisdictionMember / us-gaap_RangeAxis = us-gaap_MaximumMember
Foreign |  |  |
Other tax disclosures |  |  |
Interest paid on income tax obligations |  | 0.2 arcb_IncomeTaxInterestPaid / us-gaap_IncomeTaxAuthorityAxis = us-gaap_ForeignCountryMember |
Interest accrued |  |  | 0.2 arcb_IncomeTaxInterestAccruedDuringPeriod / us-gaap_IncomeTaxAuthorityAxis = us-gaap_ForeignCountryMember
Foreign | Maximum |  |  |
Other tax disclosures |  |  |
Remaining accrued interest | 0.1 arcb_IncomeTaxInterestAccruedBalance / us-gaap_IncomeTaxAuthorityAxis = us-gaap_ForeignCountryMember / us-gaap_RangeAxis = us-gaap_MaximumMember |  |
Federal | Maximum |  |  |
Income taxes |  |  |
Adjustment for completed audit | $ 0.1 us-gaap_IncomeTaxExaminationLiabilityRefundAdjustmentFromSettlementWithTaxingAuthority / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember / us-gaap_RangeAxis = us-gaap_MaximumMember |  |

X
- Definition The amount of accrued interest on income tax obligations as of the balance sheet date. + References No definition available. + Details
Name: | arcb_IncomeTaxInterestAccruedBalance
Namespace Prefix: | arcb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of interest accrued during the period on income tax obligations. + References No definition available. + Details
Name: | arcb_IncomeTaxInterestAccruedDuringPeriod
Namespace Prefix: | arcb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of interest paid during the period related to income taxes. + References No definition available. + Details
Name: | arcb_IncomeTaxInterestPaid
Namespace Prefix: | arcb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | arcb_OtherTaxDisclosuresAbstract
Namespace Prefix: | arcb_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_IncomeTaxContingencyLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of the additional liability or refund received or expected based on a final settlement with a taxing authority. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 + Details
Name: | us-gaap_IncomeTaxExaminationLiabilityRefundAdjustmentFromSettlementWithTaxingAuthority
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Unrecognized Tax Benefit -URI http://asc.fasb.org/extlink&oid=6527854 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319 + Details
Name: | us-gaap_UnrecognizedTaxBenefits
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=arcb_DomesticStateAndLocalJurisdictionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=us-gaap_DomesticCountryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=us-gaap_ForeignCountryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |