XML 81 R68.htm IDEA: XBRL DOCUMENT
v3.8.0.1

LONG-TERM DEBT AND FINANCING ARRANGEMENTS (Financing arrangements - Credit Facility) (Details) - USD ($) $ in Millions | Dec. 31, 2017 | Jul. 31, 2017 | Jun. 30, 2017
--- | --- | --- | ---
Credit Facility |  |  |
Financing Arrangements |  |  |
Maximum borrowing capacity |  | $ 200.0 | $ 150.0
Additional borrowing capacity that may be requested |  | 100.0 | $ 75.0
Remaining borrowing capacity | $ 130.0 |  |
Swing Line Facility |  |  |
Financing Arrangements |  |  |
Maximum borrowing capacity |  | 20.0 |
Letters of Credit, Sub-Facility |  |  |
Financing Arrangements |  |  |
Maximum borrowing capacity |  | $ 20.0 |

X
- Definition Additional borrowing capacity that may be requested by the entity under the credit facility, subject to conditions contained in the debt agreement. + References No definition available. + Details
Name: | arcb_LineOfCreditFacilityAdditionalBorrowingCapacity
Namespace Prefix: | arcb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- 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 + Details
Name: | us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- 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 + Details
Name: | us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=arcb_RevolvingCreditFacilitySwingLineFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=arcb_LettersOfCreditSubCreditFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |