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LONG-TERM DEBT AND FINANCING ARRANGEMENTS - Assets securing notes (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Financing Arrangements |  |
Total assets securing notes payable or held under finance leases | $ 280,100 | $ 271,665
Less accumulated depreciation and amortization | 98,571 | 88,696
Net assets securing notes payable or held under finance leases | 181,529 | 182,969
Revenue equipment |  |
Financing Arrangements |  |
Total assets securing notes payable or held under finance leases | 250,327 | 241,892
Service, office, and other equipment |  |
Financing Arrangements |  |
Total assets securing notes payable or held under finance leases | $ 29,773 | $ 29,773

X
- Definition Amount of accumulated depreciation and amortization on property, plant and equipment pledged to secure a debt instrument. + References No definition available. + Details
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Namespace Prefix: | arcb_
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Balance Type: | credit
Period Type: | instant

X
- Definition The gross amount of property, plant and equipment pledged to secure a debt instrument. + References No definition available. + Details
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Namespace Prefix: | arcb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The net amount of property, plant and equipment pledged to secure a debt instrument. + References No definition available. + Details
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Namespace Prefix: | arcb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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
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X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |