XML 113 R95.htm IDEA: XBRL DOCUMENT
v3.22.0.1

STOCKHOLDERS' EQUITY - Treasury Stock (Details) - USD ($) $ in Thousands |  | 1 Months Ended | 2 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Nov. 02, 2021 | Jan. 31, 2022 | Feb. 25, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Jan. 28, 2021
Treasury Stock |  |  |  |  |  |  |
Cost of repurchased shares |  |  |  | $ 83,100 | $ 6,595 | $ 9,110 |
Forward contract for accelerated share repurchase |  |  |  | $ (25,000) |  |  |
Treasury stock, at cost, shares |  |  |  | 4,492,514 | 3,656,938 |  |
Existing Share Repurchase Program and ASR |  |  |  |  |  |  |
Treasury Stock |  |  |  |  |  |  |
Number of shares repurchased during the period |  |  |  | 835,576 |  |  |
Cost of repurchased shares |  |  |  | $ 83,100 |  |  |
Existing Share Repurchase Program |  |  |  |  |  |  |
Treasury Stock |  |  |  |  |  |  |
Amount of stock repurchases authorized |  |  |  |  |  |  | $ 50,000
Amount available for repurchase |  |  |  | $ 66,900 |  |  |
Existing Share Repurchase Program | Subsequent Event |  |  |  |  |  |  |
Treasury Stock |  |  |  |  |  |  |
Number of shares repurchased during the period |  |  | 79,676 |  |  |  |
Cost of repurchased shares |  |  | $ 6,900 |  |  |  |
Amount available for repurchase |  | $ 41,900 |  |  |  |  |
Accelerated Share Repurchase Agreement ("ASR") |  |  |  |  |  |  |
Treasury Stock |  |  |  |  |  |  |
Amount paid in accelerated repurchase | $ 100,000 |  |  |  |  |  |
Number of shares repurchased during the period | 709,287 |  |  | 709,287 |  |  |
Cost of repurchased shares | $ 75,000 |  |  | $ 75,000 |  |  |
Amount of unsettled forward contract classified within stockholders' equity as additional paid in capital. |  |  |  | $ 25,000 |  |  |
Accelerated Share Repurchase Agreement ("ASR") | Subsequent Event |  |  |  |  |  |  |
Treasury Stock |  |  |  |  |  |  |
Number of shares repurchased during the period |  | 214,763 |  |  |  |  |
Forward contract for accelerated share repurchase |  | $ 25,000 |  |  |  |  |

X
- Definition Amount of unsettled forward contract indexed to the Company's common stock and classified within stockholders' equity as additional paid in capital. + References No definition available. + Details
Name: | arcb_StockholdersEquityAttributableToParentUnsettledForwardContract
Namespace Prefix: | arcb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition -- None. No documentation exists for this element. -- + References No definition available. + Details
Name: | arcb_TreasuryStockAbstract
Namespace Prefix: | arcb_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount needed to adjust previously recorded stockholders' equity balances to the actual aggregate amounts paid, whether in cash or other consideration, to acquire all of the shares purchased under an Accelerated Share Repurchase arrangement. + References No definition available. + Details
Name: | us-gaap_AcceleratedShareRepurchaseProgramAdjustment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of cash receipt from (payment to) bank; or stock received from (issuance to) bank in the settlement of the accelerated share repurchase agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 25 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6405686&loc=d3e22802-112653 + Details
Name: | us-gaap_AcceleratedShareRepurchasesSettlementPaymentOrReceipt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of stock repurchase plan authorized. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramAuthorizedAmount1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount remaining of a stock repurchase plan authorized. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Number of previously issued common shares repurchased by the issuing entity and held in treasury. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 + Details
Name: | us-gaap_TreasuryStockCommonShares
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of shares that have been repurchased during the period and are being held in treasury. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21463-112644 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_TreasuryStockSharesAcquired
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21463-112644 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 + Details
Name: | us-gaap_TreasuryStockValueAcquiredCostMethod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_ShareRepurchaseProgramAxis=arcb_StockRepurchaseProgramAndAsrMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShareRepurchaseProgramAxis=arcb_StockRepurchaseProgramMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShareRepurchaseProgramAxis=arcb_AcceleratedShareRepurchaseAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |