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ACQUISITION (Details) (USD $) | 0 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Jun. 15, 2012 | Jun. 30, 2012 | Dec. 31, 2012 | Dec. 31, 2012 | Dec. 31, 2011
ACQUISITION |  |  |  |  |
Cash purchase price, net of cash acquired |  |  |  | $ 180,039,000 |
Pro forma consolidated statement of operations |  |  |  |  |
Reversal of deferred tax valuation allowances excluded from pro forma information |  |  |  | 3,200,000 |
Reversal of deferred tax valuation allowances excluded from pro forma information (in dollars per share) |  |  |  | $ 0.13 |
Secured term loan |  |  |  |  |
ACQUISITION |  |  |  |  |
Debt issued for funding the acquisition | 100,000,000 |  |  |  |
Panther Expedited Services, Inc. |  |  |  |  |
ACQUISITION |  |  |  |  |
Business acquisition, acquired percentage | 100.00% |  |  |  |
Cash purchase price, net of cash acquired | 180,000,000 |  |  |  |
Preliminary fair value of acquired assets and liabilities |  |  |  |  |
Accounts receivable | 31,824,000 |  |  |  |
Prepaid expenses | 5,205,000 |  |  |  |
Deferred income taxes | 839,000 |  |  |  |
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 | 158,012,000 |  |  |  |
Accounts payable | 13,344,000 |  |  |  |
Accrued expenses and other current liabilities | 4,936,000 |  |  |  |
Other liabilities | 228,000 |  |  |  |
Deferred income taxes | 28,994,000 |  |  |  |
Total liabilities | 47,502,000 |  |  |  |
Net identifiable assets acquired | 110,510,000 |  |  |  |
Goodwill | 69,529,000 |  |  |  |
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 |  |  |  |
Acquisition related costs |  | 2,100,000 |  |  |
Revenue and earnings of Panther included in the accompanying consolidated statement of operations since acquisition date |  |  |  |  |
Operating revenue |  |  | 132,300,000 |  |
Operating Income |  |  | 2,400,000 |  |
Pro forma consolidated statement of operations |  |  |  |  |
Revenue |  |  |  | 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 EPS (in dollars per share) |  |  |  | $ (0.36) | $ 0.45
Panther Expedited Services, Inc. | Software |  |  |  |  |
Preliminary fair value of acquired assets and liabilities |  |  |  |  |
Amortization period |  |  |  | 7 years |

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