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Note 3 - Segment Information (Tables) | 9 Months Ended
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Sep. 30, 2013
Segment Reporting [Abstract] |
Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block] |
(in thousands) |  | Three months ended September 30, |  |  | Nine months ended September 30, |
|  | 2013 |  |  | 2012 |  |  | 2013 |  |  | 2012 |
Total Revenues: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Truckload |  | $ | 160,107 |  |  | $ | 161,625 |  |  | $ | 479,511 |  |  | $ | 477,800 |
Other |  |  | 10,736 |  |  |  | 6,802 |  |  |  | 28,550 |  |  |  | 18,959 |
Total |  | $ | 170,843 |  |  | $ | 168,427 |  |  | $ | 508,061 |  |  | $ | 496,759 |
Operating Income (Loss): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Truckload |  | $ | 6,831 |  |  | $ | 7,612 |  |  | $ | 17,969 |  |  | $ | 25,176 |
Other |  |  | 366 |  |  |  | (222 | ) |  |  | 575 |  |  |  | (373 | )
Unallocated Corporate Overhead |  |  | (1,315 | ) |  |  | (2,745 | ) |  |  | (7,027 | ) |  |  | (6,743 | )
Total |  | $ | 5,882 |  |  | $ | 4,645 |  |  | $ | 11,517 |  |  | $ | 18,060 |

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- Definition Tabular disclosure of all significant reconciling items in the reconciliation of total profit or loss from reportable segments, to the entity's consolidated income before income taxes, extraordinary items, and discontinued operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 31 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8924-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8906-108599 + Details
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