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Note 8 - Leases (Tables) | 12 Months Ended
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Dec. 31, 2013
Leases [Abstract] |
Schedule of Future Minimum Lease Payments for Operating and Capital Leases [Table Text Block] |
|  |  | Operating |  |  | Capital |
| 2014 |  | $ | 23,731 |  |  | $ | 9,741 |
| 2015 |  | $ | 21,382 |  |  | $ | 4,352 |
| 2016 |  | $ | 16,460 |  |  | $ | 3,876 |
| 2017 |  | $ | 8,287 |  |  | $ | 990 |
| 2018 |  | $ | 5,195 |  |  | $ | 990 |
| Thereafter |  | $ | 21,808 |  |  | $ | 4,168 |
Schedule of Rent Expense [Table Text Block] |
(in thousands) |  | 2013 |  |  | 2012 |  |  | 2011 |
Revenue equipment rentals |  | $ | 22,991 |  |  | $ | 19,746 |  |  | $ | 15,364 |
Building and lot rentals |  |  | 4,044 |  |  |  | 3,714 |  |  |  | 3,266 |
Other equipment rentals |  |  | 362 |  |  |  | 679 |  |  |  | 812 |
|  | $ | 27,397 |  |  | $ | 24,139 |  |  | $ | 19,442 |

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- Definition Tabular disclosure of rental expense from operating leases for each period for which an income statement is presented with separate amounts for minimum rentals, contingent rentals, and sublease rentals. Rental payments under leases with terms of a month or less that were not renewed need not be included. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717 + Details
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