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ACQUISITION (Details) (USD $) | 3 Months Ended | 12 Months Ended |  | 0 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended | 0 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Jun. 15, 2012 Secured term loan | Jun. 15, 2012 Panther Expedited Services, Inc. | Jun. 30, 2012 Panther Expedited Services, Inc. | Dec. 31, 2012 Panther Expedited Services, Inc. | Dec. 31, 2012 Panther Expedited Services, Inc. | Dec. 31, 2011 Panther Expedited Services, Inc. | Dec. 31, 2013 Panther Expedited Services, Inc. Software | May 31, 2013 Acquired Logistics Company [Member] Albert Companies, Inc.
ACQUISITION |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, acquired percentage |  |  |  |  |  |  |  |  |  |  |  |  | 100.00% |  |  |  |  |  |
Cash purchase price, net of cash acquired |  |  |  |  |  |  |  |  | $ 4,146,000 | $ 180,039,000 | $ 0 |  | $ 180,000,000 |  |  |  |  |  | $ 4,100,000
Debt issued for funding the acquisition |  |  |  |  |  |  |  |  |  |  |  | 100,000,000.0 |  |  |  |  |  |  |
Fair value of acquired assets and liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts receivable |  |  |  |  |  |  |  |  |  |  |  |  | 31,824,000 |  |  |  |  |  |
Prepaid expenses |  |  |  |  |  |  |  |  |  |  |  |  | 5,205,000 |  |  |  |  |  |
Deferred income taxes |  |  |  |  |  |  |  |  |  |  |  |  | 2,085,000 |  |  |  |  |  |
Property and equipment (excluding acquired software) |  |  |  |  |  |  |  |  |  |  |  |  | 5,678,000 |  |  |  |  |  |
Software |  |  |  |  |  |  |  |  |  |  |  |  | 31,600,000 |  |  |  |  |  |
Intangible assets |  |  |  |  |  |  |  |  |  |  |  |  | 79,000,000 |  |  |  |  |  |
Other assets |  |  |  |  |  |  |  |  |  |  |  |  | 3,866,000 |  |  |  |  |  |
Total identifiable assets acquired |  |  |  |  |  |  |  |  |  |  |  |  | 159,258,000 |  |  |  |  |  |
Accounts payable |  |  |  |  |  |  |  |  |  |  |  |  | 13,344,000 |  |  |  |  |  |
Accrued expenses and other current liabilities |  |  |  |  |  |  |  |  |  |  |  |  | 7,436,000 |  |  |  |  |  |
Other liabilities |  |  |  |  |  |  |  |  |  |  |  |  | 228,000 |  |  |  |  |  |
Deferred income taxes |  |  |  |  |  |  |  |  |  |  |  |  | 29,307,000 |  |  |  |  |  |
Total liabilities |  |  |  |  |  |  |  |  |  |  |  |  | 50,315,000 |  |  |  |  |  |
Net identifiable assets acquired |  |  |  |  |  |  |  |  |  |  |  |  | 108,943,000 |  |  |  |  |  |
Goodwill | 76,448,000 |  |  |  | 73,189,000 |  |  |  | 76,448,000 | 73,189,000 | 3,660,000 |  | 71,096,000 |  |  |  |  |  |
Cash paid, net of cash acquired |  |  |  |  |  |  |  |  |  |  |  |  | 180,039,000 |  |  |  |  |  |
Accounts receivable, fair value |  |  |  |  |  |  |  |  |  |  |  |  | 31,800,000 |  |  |  |  |  |
Accounts receivable, gross contractual amount |  |  |  |  |  |  |  |  |  |  |  |  | 32,300,000 |  |  |  |  |  |
Accounts receivable, estimated uncollectible |  |  |  |  |  |  |  |  |  |  |  |  | 500,000 |  |  |  |  |  |
Amortization period |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7 years |
Revenue and earnings included since acquisition date |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating revenues | 578,549,000 | 623,414,000 | 576,899,000 | 520,687,000 | 537,042,000 | 577,546,000 | 510,543,000 | 440,867,000 | 2,299,549,000 | 2,065,999,000 | 1,907,609,000 |  |  |  | 132,300,000 |  |  |  |
Operating income | 13,502,000 | 20,502,000 | 8,417,000 | (23,350,000) | (11,016,000) | 12,233,000 | 7,201,000 | (22,987,000) | 19,070,000 | (14,568,000) | 9,759,000 |  |  |  | 2,400,000 |  |  |  |
Acquisition related costs |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,100,000 |  |  |  |  |
Pro forma consolidated statement of operations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,171,075,000 | 2,141,057,000 |  |
Income (loss) before income taxes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (13,730,000) | 18,852,000 |  |
Net income (loss) attributable to Arkansas Best Corporation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (9,180,000) | 11,938,000 |  |
Diluted earnings (loss) per share (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ (0.36) | $ 0.45 |  |
Reversal of deferred tax valuation allowances excluded from pro forma information |  |  |  |  |  |  |  |  | $ 3,300,000 |  |  |  |  |  |  |  |  |  |
Reversal of deferred tax valuation allowances excluded from pro forma information (in dollars per share) |  |  |  |  |  |  |  |  | $ 0.13 |  |  |  |  |  |  |  |  |  |

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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=21917927&loc=d3e1043-128460 + Details
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- Definition Amount due from customers or clients for goods or services, including trade receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472 + Details
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- Definition Amount of liabilities incurred for goods and services received that are used in an entity's business and related party payables, assumed at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472 + Details
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- Definition Amount of deferred tax liability attributable to taxable temporary differences due after one year or the normal operating cycle, if longer, assumed at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472 + Details
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- Definition Amount of liabilities assumed at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472 + Details
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- Definition Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=25498275&loc=d3e2207-128464 + Details
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- Definition The amount of the change in the period in the valuation allowance for a specified deferred tax asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=21917399&loc=d3e32123-109318 + Details
Name: | us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration