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STOCKHOLDERS' EQUITY (Details 4) (USD $) | 0 Months Ended | 3 Months Ended | 1 Months Ended |
--- | --- | --- | --- | ---
May 01, 2015 | Mar. 31, 2015 | Mar. 31, 2014 | Feb. 28, 2015 | Dec. 31, 2014
Dividends on Common Stock |  |  |  |  |
Dividends declared (in dollars per share) | $ 0.06 us-gaap_CommonStockDividendsPerShareDeclared | $ 0.06 us-gaap_CommonStockDividendsPerShareDeclared | $ 0.03 us-gaap_CommonStockDividendsPerShareDeclared |  |
Dividend Amount |  | $ 1,584,000 us-gaap_DividendsCommonStockCash | $ 819,000 us-gaap_DividendsCommonStockCash |  |
Treasury Stock |  |  |  |  |
Aggregate cost of shares repurchased during the period |  | 2,459,000 us-gaap_PaymentsForRepurchaseOfCommonStock |  |  |
Stock Repurchase Program |  |  |  |  |
Treasury Stock |  |  |  |  |
Number of shares repurchased to date |  |  |  |  | 1,618,150 arcb_StockRepurchasedBalance / us-gaap_ShareRepurchaseProgramAxis = arcb_StockRepurchaseProgramMember
Aggregate cost of shares repurchased to date |  |  |  |  | 56,800,000 arcb_StockRepurchaseAggregateCost / us-gaap_ShareRepurchaseProgramAxis = arcb_StockRepurchaseProgramMember
Number of shares repurchased during the period |  |  |  | 64,200 us-gaap_TreasuryStockSharesAcquired / us-gaap_ShareRepurchaseProgramAxis = arcb_StockRepurchaseProgramMember |
Aggregate cost of shares repurchased during the period |  |  |  | 2,500,000 us-gaap_PaymentsForRepurchaseOfCommonStock / us-gaap_ShareRepurchaseProgramAxis = arcb_StockRepurchaseProgramMember |
Amount available for repurchase under the current buyback program |  | $ 15,700,000 us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1 / us-gaap_ShareRepurchaseProgramAxis = arcb_StockRepurchaseProgramMember |  |  |

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- Definition Number of shares repurchased to date under a stock repurchase plan. + References No definition available. + Details
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- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -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=27012166&loc=d3e187085-122770 + Details
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- Definition Amount of paid and unpaid common stock dividends declared with the form of settlement in cash. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -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=27012166&loc=d3e187085-122770 + Details
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